Abstract: A pistol type spear gun for use with a spear shaft comprising a body member having a handle portion adapted to be grasped in the hand of a user, with a trigger member positioned so as to be squeezed by the user on occasion. An elongate passage extends through the body member in approximately a right angle relationship with the handle portion, with this passage being adapted to receive a spear shaft. An elastic power band is attached to the body member and the base end of the spear shaft is able to be brought into contact with a mid portion of the power band when the spear shaft is moved in the cocking direction. The trigger member has a shaft contact point moved into forcible contact with a spear shaft in the elongate passage when the trigger member is squeezed.