An adjusting mechanism of adjusting an angle of an antenna module is disclosed in the present invention. The adjusting mechanism includes a base, a supporter pivotally connected to the base for supporting the antenna module, a connecting component pivoting to the supporter, and a jointing component disposed on the base and slidably inserting into a slot on the connecting component. The connecting component is for pivoting to the supporter and sliding relative to the jointing component along a direction of the slot simultaneously, so as to adjust an angle between the supporter and the base.