This paper presents a millimeter wave polarization switchable antenna. The polarization of the proposed design can be switched between right-handed circular polarization (RHCP) and left-handed circular polarization (LHCP). The antenna is planar, which can be realized using printed circuit technology. Also, this novel design does not require additional lumped capacitor for blocking DC control signal. The proposed design is realized at 60 GHz. Good impedance matching and axial-radio can be found in the simulation results. This design is suitable to be adopted in 5G applications.