A valve connector of an air pump includes a case, two connector assemblies, a pressing member and a lever. The case has a channel therein. The connector assemblies, each of which has an elastic barrel, are received in the case and communicated with the channel. The pressing member has a bottom and two arms projected from the bottom, between which the case is received. The bottom has two bores associated with the elastic barrels of the connector assembly. The lever is pivoted on the pressing member between the arms by a pin. The lever is moved to move the case proximal or distal to the bottom of the pressing member so as to compress or loose the elastic barrels.