To solve trouble, in which an interior finish worker and a painter are required and a ceiling inspection hole is difficult to be changed actually because the whole must be removed together with an inspection hole frame and a finishing material and a coated section in the periphery of the inspection hole frame must be repaired when the opening direction of a door is altered in the ceiling inspection hole, particularly a joint type ceiling inspection hole.

This ceiling inspection hole is composed of an inspection hole frame 1 and an inspection hole door 2 installed to the inspection hole frame in a manner that the inspection hole door 2 can be opened and closed, a cremorne lock 9 is mounted on one side in the inspection hole door 2, and shaft holes 11 guiding the front ends of shafts 10 on both sides of the lock 9 are constituted to each of sides placed on both sides of one side while shaft holes 14 supporting shafts 13 are configured on the sides oppositely faced to mutual one sides in the sides placed on these both sides. Distances from each side and distances from the ceiling finished surface of the inspection hole door 2 are constituted equally in these shaft holes 10 and shaft holes 14 while common holes 17 corresponding to the shaft holes 10 and the shaft holes 14 are configured on the side oppositely faced to the inspection hole frame 1, and the diameters of these common holes 17 are formed in the same size.