A burglarproof tool fitting holder device is formed with a side latch to tightly fasten a tool fitting for the effects of hanging show and protection against burglars. The device includes a tool fitting holder body and a burglarproof fixture unit. When the tool fitting holder body combines with the tool fitting in one, the fixing pedestal combines with the fixing cover plate of fixture unit in one via the two sides of the tool fitting to fasten the tool fitting. Further, ribs added in the inner fringes of the fixing cover plate and fixing pedestal is exactly wedged into the groove on the side of tool fitting to secure the tool fitting between the fixing cover plate and the fixing pedestal for effective protection against burglars.