A mousetrap. A triggering mechanism of the mousetrap comprises a supporting rod (31) capable of moving up and down relative to a front side panel (12). A box (1) is provided with a supporting and locking mechanism that is capable of rotating relative thereto and of supporting the supporting rod. The front side panel is hingedly connected to a transmission rod (33). The transmission rod is provided with an engagement and locking position (331) capable of engaging a lock portion at the supporting and locking mechanism. The box is also provided with a motor. A pull wire (35) is provided between an output shaft (34) of the motor and the transmission rod and can pull the transmission rod to rotate downward. A return spring (36) is provided between the transmission rod and the box and is for driving the transmission rod to rotate upward to return to an original position. A stepping plate (37) is provided at a top cover and drops down after being stepped on by a mouse. The stepping plate and the top cover are respectively provided with conductive contact plates (38) that can mutually contact when the stepping plate drops, such that the motor is electrically activated to rotate. A return spring (39) is provided between the stepping plate and the top cover to separate the conductive contact plates of the stepping plate and the top cover from each other. The mousetrap has a simple structure, a sensitive action, and is good at catching mice.L'invention concerne un piège à souris. Un mécanisme de déclenchement du piège à souris comprend une tige de support (31) capable de se déplacer vers le haut et vers le bas par rapport à un panneau latéral avant (12). Une boîte (1) comporte un mécanisme de support et de verrouillage qui peut tourner par rapport à celle-ci et supporter la tige de support. Le panneau latéral avant est relié de façon articulée à une tige de transmission (33). La tige de transmission comporte une position de mise en prise et de verrouillage (331) pouvant venir
