A fitting assembly including: a movable connector block including a connector coupler to which a connector is to be coupled, the movable connector block configured to be supported by a base; a floating support configured to support the movable connector block swingably together with the base; and a protrusion provided to one of the movable connector block and the base, the protrusion including a tip end that, when the connector is coupled to the connector coupler, comes into contact, in a connecting direction to the connector, with the other one of the movable connector block and the base, and swingably supports the movable connector block pivotally about the tip end.