A wavelength conversion part includes: a wavelength conversion member formed primarily of a ceramic material, wherein the wavelength conversion member has a lower face and one or more lateral faces; an enclosing member formed primarily of a ceramic material, wherein the enclosing member has a lower face, and wherein the enclosing member surrounds the one or more lateral faces of the wavelength conversion member; and a heat dissipating member having a upper face, wherein the heat dissipating member is fixed to the wavelength conversion member, and wherein the upper face of the heat dissipating member opposes the lower face of the wavelength conversion member and the lower face of the enclosing member. The lower face of the wavelength conversion member projects towards the heat dissipating member beyond the lower face of the enclosing member.