Disclosed is a block body that is to be installed onto a side wall of a hand hole, and to which cable protection pipes are to be connected, wherein connecting work of the cable protection pipes can be conducted with ease and reliability. The block body (20) is provided with resin-concrete block main-bodies (21) each of which has a
insertion-mounting hole section (23), and a plurality of synthetic-resin coming-off prevention members (22). Each of the coming-off prevention members (22) is comprised of an anchoring piece (40) buried within the block main-body (21); and a latching piece (41) that juts out into the
insertion-mounting hole section (23), and has elasticity in the
diameter direction of the
insertion-mounting hole section (23).
Insertion of a cable protection
pipe (5) into the insertion-mounting hole section (23) is allowed, by pushing a latching projecting section (11) of the cable protection
pipe (5) onto the insertion-mounting hole section (23), which thereby pushes and widens the latching pieces (41) in the outer direction of the
diameter of the insertion-mounting hole section (23). The elastically returned latching pieces (41) are thereby latched to the latching projecting section (11) of the cable protection
pipe (5) that was inserted into the insertion-mounting hole section (23), preventing the cable protection pipe (5) from coming off of the insertion-mounting hole section (23).