Relates to this invention the murine catching vessel which, possess observation opening below being located to the lower part of the substance and observation opening which vis-a-vis the dynamic possible operation section and the aforementioned operation section, gearing possibly are connected include the retainer and the carriage which makes capture tool and the aforementioned carriage slide which, adjoining to observation opening, is provided to have with the rail of the pair which and to make the aforementioned carriage move vis-a-vis capture tool, is connected in order the energization component which, the aforementioned carriage by the retainer, to be kept in installation position, when the operation section the pushing being overpowered, the retainer to release the carriage, the energization component the carriage in the railParalleling it makes move into observation opening.本発明に係るネズミ捕り器は、観察開口を有する本体と、観察開口の下方に位置される下動可能な作動部と、前記作動部に対して連動可能に連結されたリテーナと、キャリッジを含む捕捉具と、前記キャリッジを摺動させる、観察開口に隣接して設けられた一対のレールと、前記キャリッジを移動させるために捕捉具に対して連結された付勢部材とを備え、前記キャリッジはリテーナによって設置位置に保持され、作動部が押圧された時、リテーナはキャリッジを解放し、付勢部材がキャリッジをレールに沿って観察開口内に移動させる。