A wavelength converter comprising: a support member having a first surface , a second surface , and a hole that passes through a portion between the first surface and the second surface in a thickness direction; a wavelength conversion layer formed of a ceramic phosphor and having a light incident surface on which excitation light (B) can be incident and a light exiting surface which faces the light incident surface; and a light transmitting layer , formed integrally with the light incident surface of the wavelength conversion layer and made of transparent alumina; wherein the wavelength conversion layer and the light transmitting layer are disposed in the hole , the wavelength converter further comprising a light transmitting member , which includes a flat surface , provided on a side of the light transmitting layer that is a side on which the excitation light can be incident; wherein: the light transmitting member has a curved surface that protrudes in a direction opposite a traveling direction of the excitation light, with a dichroic film provided on the curved surface, that transmits the excitation light and reflects fluorescence emitted from the wavelength conversion layer , a pre-bonded surface of the light transmitting layer , which is the surface located on the side opposite the wavelength conversion layer and corresponding to the light incident surface on which the excitation light (B) is incident, and the flat surface of the light transmitting member have been bonded to each other using optical contact bonding, and the wavelength conversion layer and the transparent alumina of the light transmitting layer are formed integrally with each other in a sintering process. a support member having a first surface , a second surface , and a hole that passes through a portion between the first surface and the second surface in a thickness direction; a wavelength conversion layer formed of a ceramic phosphor and having a light incident surface on which excitation light (B) can be incident and a light exiting surface which faces the light incident surface; and a light transmitting layer , formed integrally with the light incident surface of the wavelength conversion layer and made of transparent alumina; wherein the wavelength conversion layer and the light transmitting layer are disposed in the hole , the wavelength converter further comprising a light transmitting member , which includes a flat surface , provided on a side of the light transmitting layer that is a side on which the excitation light can be incident; the light transmitting member has a curved surface that protrudes in a direction opposite a traveling direction of the excitation light, with a dichroic film provided on the curved surface, that transmits the excitation light and reflects fluorescence emitted from the wavelength conversion layer , a pre-bonded surface of the light transmitting layer , which is the surface located on the side opposite the wavelength conversion layer and corresponding to the light incident surface on which the excitation light (B) is incident, and the flat surface of the light transmitting member have been bonded to each other using optical contact bonding, and the wavelength conversion layer and the transparent alumina of the light transmitting layer are formed integrally with each other in a sintering process. <EOS>