Abstract: A mouse trap includes: a main body including a top plate and right and left side plates, of resilient material and suspended downwardly from opposite ends of the top plate, to be oppositely closed by their own resiliency, for holding and capturing a mouse therebetween; a bottom plate pivoted at one end to the lower end of one of the side plates; a stopper having a pair of engagement projections fixed to the other end of the bottom plate at its upper surface; an engagement releasing lever pivoted to both projections and having one end rising slantwise inside the main body and another end disposed under the lower end of the other side plate; a bait placing member pivoted to and erected at one end of the engagement releasing lever and freely inclined onto one side; and an adhesive sheet detachably stretched over the inner surface of the main body.