Multi-purpose adapter for mounting the feline activity devices is a utility device serving as an intermediary between the household surfaces and various accessory devices for cats. This device makes possible the convenient and fast installation of the cat scratchers, nests, rungs and other feline devices on almost any kind of a surface. This is achieved, on the one hand, by offering the large selection of mounting clips. On the another hand, the unified device-coupling option consisting of a simple pair of the pan-head screws makes it really easy to attach the feline devices to the adapter in unified way. This all allows a wide range of standard feline entertainment and active devices to be installed in such places and on such surfaces and objects, where it would be impossible without this invention.