A collapsible cross-arm dolly for conveyance of weighted articles. The dolly consists of an upper arm (20) and a lower arm (24) of square metallic tubing, with each formed with a horizontal offset center portion (22) and (26) and with a pair of casters (30) that are attached at each end of both arm's lower surface. The horizontal offset center portion (22) is formed in opposite hand or mirror image of each other, thus permitting them to nest together and are both oppositely flattened to allow nesting on the same horizontal plane. A pivot junction (32) is mutually disposed between the arms, thereby permitting the dolly to form a pivotal right angle cross position (36), or alternatively, a pivotal parallel arm collapsed position (38). A gravity-actuated restraint (50) locks and disengages the connection of the upper arm to the lower arm, which permits changing orientation from the right angle cross position (36) to the parallel arm collapsed position (36). A second embodiment is basically identical except a manual push-button restraint (78) is utilized instead of being operated by a gravity actuated restraint.