A body frame, which is a lens barrel device, comprising two semi-circular torus-shaped lens frames, respectively, mounting thereto a forward-group lens and a rearward-group lens, and two guide shafts fixed to one of the lens frames and slidably inserted into a sleeve fixed to the other of the lens frames and into a slot, the two lens frames being supported to advance and retreat relative to each other. When a jig is used to assemble the lens frames, the two lens frames are mounted to the jig while the forward-group lens, the rearward-group lens and the two guide shafts are inserted into the jig with gaps therebetween, the jig being in a state, in which the forward-group lens, the rearward-group lens and the two guide shafts are retained in a predetermined position, and an adhesive is filled into and fixed to the respective gaps to complete assembly. Such lens body frame can ensure optical performance without being affected by accuracy of parts such as lens frames, guide shafts, photographing lenses and so on.