A fixing device includes a fixing member, a pressuring member, a fixing frame, a supporting member and a biasing member. The fixing member and the pressuring member forms a fixing nip. The supporting member has a bearing part which rotatably supports the pressuring member. The biasing member biases the supporting member in a pressing direction in which the pressuring member is made to come into pressure contact with the fixing member. The supporting member has a fulcrum part and a contact part. The fulcrum part is disposed separately from the bearing part and turnably engaged with the fixing frame. The contact part is disposed on an opposite side to the fulcrum part with respect to the bearing part. The fixing frame has a restriction part. The restriction part comes into contact with the contact part to restrict the supporting member from being moved in the pressing direction.