A refrigerator having an interior refrigeration cabin enclosed by a heat-5 insulating housing and a refrigeration cabin door, the refrigeration cabin comprising at least one storage division having a flap closing the outer side thereof, the flap in mechanical communication with two flap operating portions is hingedly operated in open and closed positions by rotational movement relative to the flap operating portions wherein, - the flap operating portions connectible with the flap of the storage division are stationarily mounted into collateral cavities on lateral walls of the refrigeration cabin, - each of the flap operating portion comprises primary and secondary locking portions (8, 12) in the form of raised edge surface forms positioned on a surface portion of the flap operating portion facing a collateral cavity, the refrigerator being characterised in that - the primary and secondary locking portions (8, 12) are disposed in a successive manner along a mounting axis, the primary and secondary locking portions (8, 12) engaging with the collateral cavity in a simultaneously inter-locking manner during displacement of the flap operating portion along the mounting axis and in that the primary and secondary locking portions (8, 12) are shaped as horizontally positioned substantially U-formed raised edge surface forms, the open side of the U-formed raised edge surface forms facing a mounting direction of the flap operating portion on the mounting axis thereof and a pair of rotation restricting tabs projecting outwardly from around the base portion of the U-shaped primary locking portion cooperate with a first pair of blocking members of the collateral cavity and a pair of guiding portions structured as triangular shape end portions at the ends of the parallel extensions of the U-formed raised edge surface form of the secondary locking portion cooperates with a second pair of blocking members of the collateral cavity. - the flap operating portions connectible with the flap of the storage division are stationarily mounted into collateral cavities on lateral walls of the refrigeration cabin, - each of the flap operating portion comprises primary and secondary locking portions (8, 12) in the form of raised edge surface forms positioned on a surface portion of the flap operating portion facing a collateral cavity, the refrigerator being characterised in that - the primary and secondary locking portions (8, 12) are disposed in a successive manner along a mounting axis, the primary and secondary locking portions (8, 12) engaging with the collateral cavity in a simultaneously inter-locking manner during displacement of the flap operating portion along the mounting axis and in that the primary and secondary locking portions (8, 12) are shaped as horizontally positioned substantially U-formed raised edge surface forms, the open side of the U-formed raised edge surface forms facing a mounting direction of the flap operating portion on the mounting axis thereof and a pair of rotation restricting tabs projecting outwardly from around the base portion of the U-shaped primary locking portion cooperate with a first pair of blocking members of the collateral cavity and a pair of guiding portions structured as triangular shape end portions at the ends of the parallel extensions of the U-formed raised edge surface form of the secondary locking portion cooperates with a second pair of blocking members of the collateral cavity.