This invention relates to a device (10) for taking at least one sample of soft tissue from an organ, said device comprising a body (11) and a needle (12) formed by a stylet (13) and a cannula (14) coaxial with said stylet, said device comprising a mechanism for arming the needle, designed for sequentially moving the cannula (14) and then the stylet (13) from a rest position wherein the stylet and the cannulaare extended towards the outside of the body, to a shooting position wherein the stylet and the cannula are retracted towards the rear of the body, and a triggering mechanism designed to release the stylet then the cannula and to allow their displacement from the shooting position to the rest position, the cannula being coupled kinematically to a cannula slider (24) comprising at least one retaining element(26) for maintaining the cannula slider in a shooting position, the stylet being coupled kinematically to a stylet slider (30) comprising at least one retaining element (32) for maintaining the stylet slider in a shooting position and means for unlocking (34) the cannula slider. In this device, at least one element among said retaining element of the cannula slider (26) and said retaining element of the stylet slider (32) comprises at least one hook (51), this hook comprising at least an elastic blade (52) arranged for resting against a corresponding retaining device(27, 33) in a locking position and for being released from the corresponding retaining device(27, 33) in a shooting position, said elastic blade (52) having at least one bending area (53) around which this elastic blade is bent under the action of a stress, and said bending area (53) is placed at the rear of said corresponding retaining device(27, 33).La présente invention concerne un dispositif (10) pour prélever au moins un échantillon de tissu mou sur un organe, ledit dispositif comprenant un corps (11) et une aiguille (12) formée par un stylet (13) et une canule (14) coaxiale avec ledit stylet,
