A refrigerator to be installed in a storage space (Fs) defined by a wall 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 (150, 151) installed in the inner case, the supply duct (150, 151) configured to discharge cool air to the storage chamber; a cool air circulation fan installed at one side of the supply duct (150, 151), 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, 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 (150, 151) installed in the inner case, the supply duct (150, 151) configured to discharge cool air to the storage chamber; a cool air circulation fan installed at one side of the supply duct (150, 151), 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, 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.