This　paper　presents　a　dual-band　printed　phased　array　antenna　fed　by　microstrip　lines　operated　in　5G　millimeter　wave　band.　The　reflection　coefficients　are　less　than-10　dB　for　lower　band　(25.5GHz　to　28.5　GHz)　and　upper　band　(38.5　GHz　to　42.5　GHz)　band,　respectively　and　the　port　isolation　is　better　than　12.8　dB.　The　proposed　design　is　integrated　with　parasitic　elements,　shorting　pins　and　copper　frame.　The　dual-band　response　is　achieved　by　introducing　the　I-shaped　slot　from　each　patch　antenna　in　the　array.　The　simulated　directivity　of　the　array　antenna　is　14.6　dBi　and　14.3　dBi　at　27GHz　and　39GHz,　respectively.　The　proposed　phased　array　is　a　suitable　candidate　for　5G　millimeter　wave　mobile　communications　due　to　its　merits　of　broadband,　good　radiation　pattern,　low　profile,　and　etc.　©　2020　IEEE.