A rotary support apparatus is provided that includes a rotation mechanism, a support mechanism, an object detector and a controller. The rotation mechanism is configured to rotatably support a supported body between a first position and a second position. The support mechanism is configured to support the supported body with at least a two stage support force at the first position. The object detector is configured to detect a person or an object. The controller is configured to control the support mechanism so as to switch the support force based on the results detected by the object detector.