Abstract: A disposable mouse trap (10) for capturing and killing mice or other small animals. The trap (10) comprises an elongated four-sided prism-shaped enclosure (12) provided with an entry end (22) for providing access to the enclosure (12) and an end wall (24) sealing the further end of the enclosure (12). The trap (10) further comprises a trap member (28) hingedly engaged to a corresponding wall of the prism-shaped enclosure (12) such that the trap member (28) will swing toward the end wall (24) of the enclosure (12) to a set position and will swing away from such corresponding wall of the enclosure (12) to a triggered position wherein the trap member (28) is substantially perpendicular to the side walls of the prism-shaped enclosure (12). A biasing means is providing for urging the trap member (28) toward the triggered position along with a trigger member (26) for restraining the trap member in a set position against the force of the biasing means.