Abstract: A pushcart includes two front braces and a rear support having a cross bar and two legs. Two ends of the cross bar are movably received in a locating brace and a locking part of a leg position control gear fixedly mounted to rear sides of the two front braces. A push part of the gear is movably connected to a rear side of the locking part. When the cross bar is moved to a lower end of the locking part to move the two legs to an extended position, a lever mounted in the locking part is pushed by an elastic element mounted on the push part to press against the cross bar and thereby prevent the extended legs from moving. When the push part is pushed upward, the lever is moved away from the cross bar, allowing the legs to move toward the front braces into a collapsed position.