Abstract: A theft alarm device adapted to be utilized between a lady's purse and the strap associated therewith, and constructed of a housing means including a whistle forming a part thereof, with an aerosol container having a valve at one end thereof and mounted within the housing means in alignment with the whistle such that when the container is opened the pressurized gas released therefrom will activate the whistle to produce an audible alarm sound therefrom. Coupling means is associated with each end of the housing means for securing same between the strap and the lady's purse, with activating means operatively associated with the coupling means and the container so as to obtain a release of the valve such that the gas activates the whistle to produce the audible sound when a predetermined force is applied to the lady's purse. Accordingly, a sudden pull or jerking force exerted on the purse or handle will cause the alarm to be actuated.