Abstract: A trap for mice or other small animals has an open-topped box-like base to which are hinged a striker and a combined bait holder and retainer, an elastic band tensioned between the striker and base urging the striker down from a raised or set position to striking position, entering the base, the retainer being releasably engageable with the striker to hold it in set position until the bait holder is depressed to free the striker to be driven to striking position, the base, the striker and the bait holder and retainer being assembled from a single blank of sheet material, the striker and the bait holder and retainer being hinged to the base along bend lines in this material.