PROBLEM TO BE SOLVED: To provide a housing box which avoids turning crushed by the tilting of a side surface plate outside and the enterance of a front surface plate when a pressing force is applied to the front surface plate and a back surface plate at a section of the separated ridge line.;SOLUTION: A front surface taking-out opening 13 which continues from a top surface opening 12 is formed by separating the ridge line section 19 between the front surface plate 14 and the side surface plate 16 on the top surface side section. At the same time, a front surface openable/closable lid 20 which opens/closes the front surface taking-out opening 13 when being turned with a line which connects proximal end sections 19b of a separating section 19a of the ridge line section 19 as a pivot is formed while continuing from the top surface plate 18. Also, an internal flap 21 which is connected with the top surface side edge section 16a of the side surface plate 16 is equipped with a front surface side protruding section 21a which protrudes to the front surface side more than the width region B of the top surface side edge section 16a. The protruding end edge of the front surface side protruding section 21a abuts on the internal surface of the distal end section of the front surface openable/closable lid 20 when an insertion flap 22 of the top surface plate 18 is inserted in a gap 23 between the back surface plate and the internal flap 21, and the top surface opening 12 and the front surface taking-out opening 12 are closed.;COPYRIGHT: (C)2007,JPO&INPIT
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