The present invention discloses a printed dual band antenna that includes a primary radiation portion and a parasitic radiation portion. The primary radiation portion is configured to perform signal transmitting and receiving based on a first resonant frequency and a second resonant frequency. The parasitic radiation portion is disposed on a neighboring side of the primary radiation portion, distanced from the primary radiation portion by a distance and electrically isolated from the primary radiation portion. The parasitic radiation portion couples to and resonates with the primary radiation portion to perform signal transmitting and receiving based on the second resonant frequency. The parasitic radiation portion is a grounded monopole parasitic antenna.