A wheelchair including a seating bottom portion, a chair back bottom support member supporting a chair back bottom member, a chair knee bottom support member supporting a chair knee bottom member, a chair leg first bottom support member bendably coupled to the chair knee bottom support member, the chair leg first bottom support member supporting a chair leg first bottom member, a chair leg second bottom support member bendably coupled to the chair leg first bottom support member, the chair leg second bottom support member supporting a chair leg second bottom member, a chair base portion bendably coupling the chair back bottom support member and the chair knee bottom support member and supporting a chair waist bottom member, a first link portion coupling the chair back bottom support member and the chair knee bottom support member, and a second link portion coupling the chair back bottom support member and the chair leg first bottom support member to each other, the wheelchair forms a bed capable of being changed to a knee lifting posture when being combined with a bed main body portion.