A multiband printed antenna includes a radiation unit and a grounding unit. The radiation unit is arranged at a right of a circuit board. The radiation unit includes a first radiation part, and a second radiation part which is extended upward and then is bent rightward from a left of a top edge of the first radiation part. The grounding unit is arranged at a left of the circuit board. The grounding unit is separated from the radiation unit. The grounding unit includes a first extension, a second extension straightly extended leftward from a top of a first left edge of the first extension, a grounding part straightly extended leftward from a bottom of the first left edge of the first extension, and a third extension straightly extended leftward from a middle of the first left edge of the first extension.