A belt buckle for an aircraft safety belt, wherein the belt buckle comprises: - a main body defining a receiving space for at least partially receiving a buckle tongue of an aircraft safety belt; - a mount configured for fixing a belt strap of the aircraft safety belt by winding it around, wherein a length of the aircraft safety belt is adjustable by displacing the belt strap on the mount ; and - a locking device configured for latching the buckle tongue at the main body in a position at least partially inserted into the receiving space for closing the aircraft safety belt; wherein the main body comprises a base plate and, at two opposite sides, lateral supports protruding therefrom, wherein the base plate and the lateral supports at least partially limit the receiving space , and the base plate forms a substantially flat base area ; wherein the mount is translationally movably mounted at the lateral supports and a clamping edge of the base plate facing the mount protrudes from the base area in the direction of the mount , the mount thus being pulled towards the clamping edge when a tensile load is applied to the belt strap and the belt strap being clamped between the clamping edge and the mount , thus blocking a change in length of the aircraft safety belt; wherein the mount comprises a pin member which is translationally movably mounted in respective elongate through holes of the lateral supports , characterized in that the mount comprises a sheath which is snapped onto the pin member and configured in order for the belt strap to be wound around it; and wherein the main body is formed from an aluminum material, the pin member is formed from a metallic material, and the sheath is formed from a plastic material. - a main body defining a receiving space for at least partially receiving a buckle tongue of an aircraft safety belt; - a mount configured for fixing a belt strap of the aircraft safety belt by winding it around, wherein a length of the aircraft safety belt is adjustable by displacing the belt strap on the mount ; and - a locking device configured for latching the buckle tongue at the main body in a position at least partially inserted into the receiving space for closing the aircraft safety belt; wherein the main body comprises a base plate and, at two opposite sides, lateral supports protruding therefrom, wherein the base plate and the lateral supports at least partially limit the receiving space , and the base plate forms a substantially flat base area ; wherein the mount is translationally movably mounted at the lateral supports and a clamping edge of the base plate facing the mount protrudes from the base area in the direction of the mount , the mount thus being pulled towards the clamping edge when a tensile load is applied to the belt strap and the belt strap being clamped between the clamping edge and the mount , thus blocking a change in length of the aircraft safety belt; wherein the mount comprises a pin member which is translationally movably mounted in respective elongate through holes of the lateral supports , characterized in that the mount comprises a sheath which is snapped onto the pin member and configured in order for the belt strap to be wound around it; and wherein the main body is formed from an aluminum material, the pin member is formed from a metallic material, and the sheath is formed from a plastic material. <EOS>