A refrigerator to be installed in a storage space (Fs) defined by a wall (W) of an object, the refrigerator comprising: a cabinet including an inner case which forms a storage chamber , an outer case which surrounds the inner case and a cabinet insulation material which is disposed between the inner case and the outer case ; a door disposed in front of the cabinet , the door to close the storage chamber ; a supply duct installed in the inner case , the supply duct configured to discharge cool air to the storage chamber ; a cool air circulation fan installed at one side of the supply duct , the cool air circulation fan configured to generate circulation of the cool air; and the refrigerator being characterised by a contact mechanism provided on one side of the outer case the contact mechanism including a housing provided on the cabinet , a lever which is movably provided, a guide plate which is movable forward or backward based on a movement of the lever , and a contact member to move with the guide plate for contact with the wall (W), wherein the contact member is moved from a side surface of the housing or of the outer case of the cabinet in a lateral direction or be drawn in the opposite direction thereof according to the movement of the lever , wherein the contact mechanism further includes a stopper mechanism which is configured to restrict movement of the guide plate in a forward or backward direction, said stopper mechanism including: an engaging member which is provided on the guide plate ; and a rack to engage with the engaging member and restrict movement of the guide plate in a forward or backward direction. a cabinet including an inner case which forms a storage chamber , an outer case which surrounds the inner case and a cabinet insulation material which is disposed between the inner case and the outer case ; a door disposed in front of the cabinet , the door to close the storage chamber ; a supply duct installed in the inner case , the supply duct configured to discharge cool air to the storage chamber ; a cool air circulation fan installed at one side of the supply duct , the cool air circulation fan configured to generate circulation of the cool air; and the refrigerator being characterised by a contact mechanism provided on one side of the outer case the contact mechanism including a housing provided on the cabinet , a lever which is movably provided, a guide plate which is movable forward or backward based on a movement of the lever , and a contact member to move with the guide plate for contact with the wall (W), wherein the contact member is moved from a side surface of the housing or of the outer case of the cabinet in a lateral direction or be drawn in the opposite direction thereof according to the movement of the lever , wherein the contact mechanism further includes a stopper mechanism which is configured to restrict movement of the guide plate in a forward or backward direction, said stopper mechanism including: an engaging member which is provided on the guide plate ; and a rack to engage with the engaging member and restrict movement of the guide plate in a forward or backward direction. an engaging member which is provided on the guide plate ; and a rack to engage with the engaging member and restrict movement of the guide plate in a forward or backward direction. <EOS>