The present invention relates to an assembly-type cat tower. A connecting member is selectively coupled with a connector member disposed at the edges on every side thereof. An optimal cat tower structure can be produced according to the size of a space where a cat is raised or to the number of entities. The same can be simply installed and disassembled so as to be easily transferred or moved. The shape of the cat tower can be periodically deformed so that a cat does not get tired of the same. A partition member made of fabric paper having various patterns and colors is used for aesthetic purposes. When a net-shaped border member is selectively mounted, a part of the cat tower structure can be used as a cage for caging a cat therein. When a scratcher member, wound with twine and the like, is selectively mounted, the same can be used as a playing tool so that a cat can scratch the same with its toenails and bite the same with its teeth. When an adsorption member or a wheel member is selectively equipped at the bottom end of the cat tower, the cat tower can be prevented from being unintentionally moved or dropping by means of the adsorption member, and movement and transportation can be easily performed by means of the wheel member. The assembly-type cat tower according to a preferable embodiment of the present invention comprises the following parts: multiple connector members, each of which is formed in a hexahedral form and has coupling grooves formed on each surface thereof； a connecting member which has a first coupling projection formed to protrude on both ends thereof in order to be coupled with the inside of the coupling groove to be able to be attached and detached and is connected with the connector member in various assembling types； and a partition member, which has a second coupling projection formed to protrude at the edge of one surface thereof in order to be coupled with the inside of the coupling groove to be able to be attached and detached, is formed
