Abstract: The present invention relates to a bicycle cover having an attachable alarm means. The cover includes a substantially elliptical bag member formed of a pair of opposing planar side panels that are peripherally joined to form a storage compartment therebetween. Sewn into the side panels are a plurality of electrically conductive cables which converge and protrude through an opening on the bag member. The external portions of the cables are intertwined and received within an elongated insulated electrical cord similar to an extension cord. The distal ends of the cables are connected to a male electrical connector on the cord which is selectively coupled with an external alarm means. The alarm means comprises a power source, a motion switch and a sound emitting means which audibly alerts a user when an unauthorized person is tampering with the bag.