Abstract: An animal trap for use with a piece of bait to trap animals, such as mice. The trap includes a hollow body member having an access opening, a trap door movable between an open position in which the access opening is open and a closed position in which the access opening is closed, and a trigger structure for selectively holding the trap door in the open position. The trigger structure includes a bait holder to hold the piece of bait. The trigger structure allows the trap door to move to the closed position if the piece of bait is removed from the bait holder.