Performansas (angl. perfomance art – atlikimo menas) – trumpalaikiai teatrališki veiksmai, atliekami žiūrovų akivaizdoje.

Performance art is a performance presented to an audience within a fine art context, traditionally interdisciplinary. Performance may be either scripted or unscripted, random or carefully orchestrated, spontaneous or otherwise carefully planned with or without audience participation. The performance can be live or via media; the performer can be present or absent. It can be any situation that involves four basic elements: time, space, the performer's body or presence in a medium, and a relationship between performer and audience. Performance art can happen anywhere, in any type of venue or setting and for any length of time. The actions of an individual or a group at a particular place and in a particular time constitute the work