Abstract: An anti-theft ski alarm has a generally rectangular housing having a flat bottom surface provided with a slot. A peg having an enlarged head portion adapted to be received within the slot is secured to the upper surface of a ski to be protected. The enlarged head of the peg is inserted into the slot and an arming switch of the device is actuated, which causes a latch to block removal of the peg from the slot. A spring biased solenoid rod operates to block opening of the latch unless a code is correctly entered on a keypad. When the correct code is entered, a relay energizes the solenoid to retract the solenoid rod allowing the latch to be moved to an open position. An audible alarm within the device is actuated by a vibration switch which detects movement of the skis. The keypad includes a plurality of "dummy" keys to prevent breaking of the code sequence.