to overlay the segment 34 in the channel 32 locking member 52 will remain in this attitude as a result of the relatively firm gripping forces exerted between the belt segment 20 and the gripping teeth 54 the belt is thus firmly clamped by the teeth of the locking member while the gripping member 16 is locked in the channel by the segment 56 of the locking member which overlays the channel 32 after clamping any forces acting on the belt which may tend to cause withdrawal of the belt from the retainer member 14 will operate on the locking member to cause the locking member to rotate in the direction 70 thus enhancing clamping and inhibiting release of the belt when the belt is fitted on a user the tongue member 38 engages an aperture 72 of the belt end 22 the extending segment 22 of the belt is positioned in the keeper slot 40 and is thereby restrained disassembly is accomplished by manually rotating the locking member with finger force in a second opposite direction as represented by the arrow 74 in fig4 the user 39 s finger nail is placed in a small slot 76 extending between the segment 56 and a wall forming the channel 32 the elongated segment 56 provides a lever arm for rotating the teeth 54 out of gripping engagement with the belt segment 20 an improved demountable belt buckle has thus been described the buckle is advantageous in that it can be readily mounted and demounted and provides for substitution of different belt gripping members a user can advantageously employ the buckle with two sided belts and with belt gripping members of different design the retailer.