It is formally called tachimawari (stylized fight scene) in Kabuki or tate (sword battle) in theatrical performances as well as movies and commonly called 'chanbara.'
正式には立回り（歌舞伎）、殺陣（たて。演劇・映画）などと呼ばれ、俗称として「チャンバラ」が用いられる。