A clamping apparatus for an antenna is disclosed. The present disclosure according to at least one embodiment provides a clamping apparatus for an antenna, including a housing having one side that is coupled to a support pole, a driving unit including a motor and a gearbox connected to the motor, and housed within the housing, a shaft connected to the driving unit and rotating in conjunction with a rotational motion of the motor, a nut coupled to the shaft and moving in a direction parallel to a direction of extension of the shaft in accordance with the rotational motion of the shaft, at least one pivot unit pivoting about a pivot axis in response to a linear movement of the nut, and a pivot bracket unit pivoting in conjunction with a pivoting movement of the at least one pivot unit, and having one end for coupling with an antenna module so that the antenna module rotates about the pivot axis in response to the pivoting movement of the at least one pivot unit.