A parry is a fencing bladework manoeuvre intended to deflect or block an incoming attack.

To execute a parry, fencers strike the opponent's foible, or the area near the tip of the blade, with their forte, or the part of the blade near the handle of the sword. This deflects the opponent's blade away from them, protecting them and placing them in a good position to strike back. Approximations of the precise parries are made often during bouts, but are usually accurate enough to be classed as parries.

In épée, because of absence of priority rules (see right-of-way), a parry can be classed as anything that prevents the opponent's attack from landing.

The primary function of a parry is to prevent an opponent's attack from landing. During a bout, parries are commenced from the "en garde" (neutral) position, when an opponent's attack is considered threatening. In foil and saber, the rules governing the parry give it tactical significance as well:

In foil and sabre, there is a rule known as priority, or right-of-way. To gain a point, a fencer must land a hit while having the priority. The first fencer to commence an attack often gains the priority. If the attack results in a successful hit, the fencer gains a point. However, if the attack fails, the priority is transferred to the defender. Defending with a parry causes the attack to fail, both physically and as far as the priority rule is concerned. Taking a parry, therefore, means that the attacker is in an awkward position (with their arm extended and sometimes off-balance), having just committed to attacking, and the defender has the priority, as well as the best position to riposte, or strike after parrying.