The present invention discloses a device with connecting member having an elastic ring, and the device includes a body having at least one accommodating cavity on the body and an exhaust opening on the internal periphery of each accommodating cavity; and at least one connecting member having an insert unit at an end of each connecting member, at least one positioning block at the periphery of the insert unit and at least one elastic ring sheathed onto the periphery of the insert unit, such that if the connecting member is inserted into the accommodating cavity, the shape of the accommodating cavity can accommodate the insert unit and each positioning block precisely.