Skip to content
Volley Rotations
All guides

Libero rules explained

Why the libero exists

The libero lets a team keep its best passer and digger on court in the back row without using substitutions. In return, the libero gives up serving (under FIVB rules), blocking and attacking above the net. The rules are in FIVB rule 19.

Who the libero replaces

The libero can replace any back-row player (rule 19.3.2). Most teams use the libero for the middle blockers: middles are tall, built for blocking and quick attacks, and usually weaker passers. When a middle rotates into the back row, the libero comes on; when that middle would rotate to the front row again, the libero goes off and the middle comes back.

The libero takes the exact place of the replaced player in the rotation order, including for the overlap rule.

Serving: under FIVB rules the libero may not serve. So when the middle reaches zone 1 and the team is serving, the middle serves. Once the team loses the serve, the libero can come back on for the middle. Some teams have the libero replace a different player in that rotation, which is legal as long as there is a completed rally between the two replacements (see below).

What the libero may not do

Under FIVB rule 19.3.1 the libero:

  • may only play as a back-row player;
  • may not complete an attack hit from anywhere (on the court or in the free zone) if, at the moment of contact, the ball is entirely higher than the top of the net;
  • may not serve, block or attempt to block.

The libero may play the ball overhand, dig, pass and set from anywhere, including in front of the attack line.

The overhand set rule

If the libero uses an overhand finger pass (a set) while standing in the front zone (in front of the attack line, or its extension outside the court), a teammate may not complete an attack hit on that ball if it is entirely above the top of the net.

There is no limit when:

  • the libero sets from behind the attack line, or
  • the libero passes with the forearms (a bump set) from anywhere.

That is why liberos who set in transition often jump from behind the line, or bump-set when they are in front of it. What counts is where the libero’s feet were when they set: if they take off from behind the line, they are not in the front zone.

Replacements are not substitutions

Libero replacements (rule 19.3.2):

  • are not counted as substitutions and are unlimited;
  • must be separated by a completed rally: the libero cannot go off and come back on, or swap for another player, between the same two serves;
  • may only be made while the ball is out of play and before the whistle for the serve;
  • are made in the libero replacement zone: the part of the sideline next to the team’s bench, between the attack line and the end line;
  • bring back only the player the libero replaced (or the second libero): the libero cannot be swapped out for someone else.

A libero replacement made after the whistle but before the serve is hit is not refused, but the team is told it is not allowed, and later late replacements can be sanctioned as a delay.

Two liberos

A team may name up to two liberos in its list of players (rule 19.1). Only one may be on court at a time. Each may replace the other. In FIVB competitions, a team with more than 12 players on the score sheet must name two liberos. If a libero is injured or sent off, the coach can bring in the second libero, or re-designate a new libero from players not on court at that moment.

Leagues that differ

Many competitions change the libero rules:

  • In NCAA and much of US volleyball, and some other leagues, the libero is allowed to serve, usually in one rotation only.
  • Some recreational leagues have no libero at all, or allow any back-row specialist.
  • Youth competitions may have their own rules about substitutions and liberos.

Check your league’s rules before the season. This site’s tools follow FIVB: the libero replaces the middles and never serves.

Practise it

In the position explorer choose “libero” as your role and step through all six rotations to see when the libero comes on, where they pass, and where they defend. The match tracker keeps track of libero replacements during a game.