An apparatus for adjusting an inclination angle of an antenna using a rotatory power is disclosed, wherein a remote control unit is easily combined with the apparatus. The apparatus in an antenna having a phase shifter includes a power delivering member connected to the phase shifter, and a driving member combined with the power delivering member, and for providing a power to the power delivering member. Here, an inserting section is formed at a part of outside surfaces of the driving member, a remote control unit is inserted into the inserting section and rotates the driving member, and the power delivering member rotates in response to the power provided from the driving member. Accordingly, any given member is not removed when the remote control unit is combined with the apparatus. As a result, the remote control unit may be easily combined with the apparatus, and any member is not lost.