Abstract: A rodent trap involving an enclosure, having at least one rodent entrance, within which a rodent-trapping member is attached to a shaft which extends through the top of the enclosure. The rodent-trapping member, which may have either a rodent-striking surface or a rodent-enclosing surface, is spring biased from a cocked position high within the enclosure to a released position. The rodent-trapping member is retained in the cocked position by means of a supported retaining pin whose inner end extends into a beveled indentation in the shaft. Release is caused by the movement of the outer end of the retaining pin into alignment with an aperature in the side of the enclosure. Movement of the outer end of the retaining pin is created by pivoting a transversely attached retaining release bar about an adjustable pivot point; such pivoting being generated through mechanical linkage by the movement of a bait holder, or in the alternative, by a hinged floor section.