Buckle

A buckle including a female body and a male body, wherein said female body is formed with a holding space for holding said male body in a housing having an upper face plate and a lower face plate;

• an insertion opening for insertion of said male body and a key insertion hole, both of which communicate with said holding space, are provided in said housing;
• a belt attaching portion is provided at an end of said housing opposing to said insertion opening;
• said male body is provided with a belt adjusting portion at a base end of an inserting portion;
• an engaging portion is provided on either one of said housing and said inserting portion;
• an engaged portion, which is elastically deformable, is provided on the other one of said housing and said inserting portion;
• wherein when said inserting portion is inserted in said housing, said engaging portion and said engaged portion are engaged with each other and said belt adjusting portion is inserted into the holding space, which exists between the upper face plate and the lower face plate of the housing, and is concealed by said housing;
• and wherein when said inserting portion is pulled out from said housing, said engaged portion is elastically deformed by insertion of a key to release said engagement of the engaging portion and said engaged portion.