A strap connector of a body fitting device generally includes a connector body, which includes a first movement space and a second movement space that is separated from the first movement space; a first movable block, which is slidably mounted to the connector body and is received in the first movement space and is reciprocally slidable upon being acted upon by an external force; a second movable block, which is slidably mounted to the connector body and is received in the second movement space and is reciprocally slidable upon being acted upon by an external force; and an elastic assembly, which is in contact engagement with and positioned between the connector body and the second movable block to provide an elastic cushioning force to the second movable block.