In this paper, a windmill shaped pattern reconfigurable element and its two-dimentional (2-D) wideband wide-angular scanning phased array antenna as an array element are proposed. The proposed single feed pattern reconfigurable unit antenna is composed of radiation patch, DC bias circuits and broadband artificial magnetic conductor (AMC) reflector. The radiation patch composed of four Vivaldi slots is a windmill-shaped patch with a reconfigurable feeding structure. By electrically controlling the PIN diodes integrated in the feeding network, the radiation beam of the element can be switched towards four endfire directions. Besides, the fan-shaped AMC surface is loaded backward the radiation patch. In this situation, the maximum radiation direction is titlted from the original endfire direction into a quasi-endfire direction, which benefits that the main beam of the planar phased array covers the broadside direction. The antenna unit and its construction 8 × 8 uniform planar phased array is simulated and analyzed. The simulation results show that the designed planar array has the performance of wide-band and wide-angle two-dimensional beam scanning,which supports its maxmum scanning angle of ±60° in two main planes from 5.4 to 6.1 GHz. Meanwhile, the gain fluctuation of the array is less than 4.3 dB, and the sidelobe level is quite low.