A strap dispenser includes a main body and two loading units. The loading units are configured to receive a strapping roll. The loading units are connected with a connecting member and an elastic member. When in use, a strapping roll is first placed on one of the loading units to be guided and located between the loading units through the connecting member and the elastic member. When the strapping roll is pulled, the strap dispenser can prevent the strapping roll from being jammed or pulled out of the loading units due to the action of the centrifugal force.