In a mounting apparatus, a first spring member has an arc shape, and a second spring member is provided integrally with the first spring member or provided separately from the first spring member to be coupled to the second spring member. The second spring member is disposed inside the first spring member at a predetermined angle from the first spring member. A holding member holds the second spring member to be fitted into the holding member such that the holding member is in contact with a wearer. The configuration is able to reduce a load applied onto a head of the wearer while providing an improved fitting on the wearer.