What are the volleyball substitution rules?

A substitution in volleyball is the act of one player leaving the court and a teammate from the bench entering in their place, taking the departing player's spot in the rotation order. It happens between rallies, is requested by the coach, and every change is logged on the official score sheet.

Every team dresses 12 players in the standard FIVB format: six on court and up to six on the bench, one or two of whom may be designated liberos. Substitutions let the coach adjust matchups, rest a tired player, or send on a specialist for one skill such as serving or back-row defence.

The key idea is that a substitution swaps the person but not the position. The incoming player inherits the outgoing player's place in the serving order and their front- or back-row status, so a sub never lets a team dodge the rotation. To understand where each spot sits, see our guide to volleyball positions.

Two categories of change exist and they are governed by different rules. A regular substitution counts against a strict per-set limit and is what most people mean by "a sub." A libero replacement is a separate, informal exchange that is not counted at all. Confusing the two is the most common scorekeeping error at club level, which is why the score sheet tracks them in different columns.

Under the FIVB Official Volleyball Rules 2025-2028, a team may make a maximum of 6 substitutions per set. A starter may leave the game and re-enter, but only once per set and only into their original position in the rotation order.

This creates a fixed-pair system. When starter A is replaced by substitute B, only B can go in for A, and later only A can come back for B. That single starter–substitute couple is locked for the rest of the set. A substitute who has entered the game may be replaced only by the starter they came in for, never by a third player.

Because each swap and its reversal both count, one starter–substitute pair can use two of the six allotted changes. A coach who wants to rotate three different pairs in and out and bring them all back will exhaust the limit quickly, which is exactly why the rule is called limited substitution. It caps line-up shuffling and keeps rotation meaningful.

A player who has started the set has one re-entry available; a player who started on the bench and came on has one exit available. Neither can enter a third time. The second referee and scorer reject any request that breaks these constraints. For how points and sets are won around these swaps, see how volleyball scoring works.

No. A libero replacement is not a substitution and does not count against the six-sub limit. The libero exchanges with a back-row player between rallies as often as the team wishes, provided one completed rally has passed since the previous replacement.

These replacements are unlimited, happen near the attack line rather than the substitution zone, and do not require the second referee's authorisation. The libero cannot complete an attack above net height, cannot serve in most codes, and cannot set the ball with fingers from inside the front zone for an attacker to spike. Because the libero already covers most back-row defence, teams rarely need a defensive substitution.

A defensive specialist (DS) is different again: it is a regular substitution that counts against the six, uses no special jersey, and the player is allowed to serve. Coaches use a DS when they want back-row defence but also the option to serve — something the libero usually cannot do.

Move	Counts vs 6-sub limit?	Can serve?	Notes
Regular substitution	Yes	Yes	Fixed starter–sub pair; one re-entry per starter
Libero replacement	No	No (most codes)	Unlimited; one rally must pass between replacements
Defensive specialist	Yes	Yes	A normal sub used for back-row defence; no jersey rule

Follow the score and sets live on our volleyball live scoreboard.

College and high-school volleyball in the United States allow more team substitutions per set than FIVB's six, and they apply different re-entry rules. The exact figures vary by governing body, so always confirm the current rulebook for the competition you are officiating before applying a number.

NCAA women's volleyball uses a substitution model with a per-set team limit well above six and its own tracking of individual re-entries. NFHS high-school volleyball likewise permits a higher per-set team total than the international game. Both codes are designed to give more athletes court time, which suits developmental and educational settings.

The practical effect is that a college or high-school coach can shuffle the line-up far more freely than an international coach bound by the six-sub cap. Re-entry rules also differ: the strict FIVB fixed-pair constraint is relaxed in some domestic codes, though each still limits how many times one player may enter.

Code	Per-set team sub limit	Governing rulebook
FIVB / international	6	FIVB Rules 2025-2028
NCAA women's	More than 6*	NCAA Rules Book
NFHS high school	More than 6*	NFHS Rules Book

*Confirm the current figure in the rulebook. Whenever you cross between codes, re-read the substitution section first — the numbers and re-entry mechanics are among the most frequently misremembered rules in the sport.

A substitution takes place between rallies through the substitution zone, the area in front of the scorer's table between the attack line and the centre line. The coach requests the change, players report to the second referee, and the scorer logs it before play resumes.

The mechanics are precise. When the ball is out of play, the coach makes the substitution gesture or a request through the scorer. The incoming and outgoing players stand ready in the substitution zone; the outgoing player must leave before the substitute steps on. Both wear numbered jerseys so the officials can verify the swap against the line-up sheet.

The second referee authorises the change, checks it is legal against the rotation and the six-sub count, and only then does the scorer enter it on the sheet. Every substitution is written down with the players' numbers and the score at which it happened, which is how officials reconstruct a set if a dispute arises.

A team may request several substitutions at the same stoppage, but each departing player must be handled one at a time and each still counts individually toward the limit. If a request is illegal — wrong player, wrong position, limit exceeded — the second referee refuses it and the team is warned for delay. For the officials' side of this, see our volleyball referee guide.

Coaches substitute to gain a specific advantage: a strong server for a weak-serving player, a back-row defender for a tall front-row hitter as they rotate to the back, or a fresh body at a decisive point. Each move spends one of the six allowed changes for a targeted edge.

The serving substitution is the classic example. A coach sends on a reliable server for a front-row attacker who has just rotated to the serving position, hoping for a run of points, then swaps the starter back once the serve is lost — using two of the six changes for one rotation. It is a calculated gamble on serve pressure.

A defensive substitution replaces a big blocker with a steadier passer when that hitter rotates to the back row, tightening reception and dig coverage. Since the libero already patrols most back-row defence between rallies for free, coaches reserve this sub for the small gaps the libero cannot fill, such as when they want the incoming player to serve.

Late in a tight set, a point-of-the-match swap brings on a specialist for a single crucial rally — a blocking sub against a dangerous opposite, or a calm server at 24-24. Because the six-sub limit is shared across the whole set, smart coaches hold a change or two in reserve rather than emptying the bench early, keeping options open for the closing points.