A light guiding unit comprising: a light guiding member that light enters; and an angle converter that the light from the light guiding member enters, wherein the light guiding member has a side surface and a light exiting end surface which intersects the side surface and via which the light exits, the angle converter includes a light incident section on which the light from the light guiding member is incident, a light exiting section via which the light incident on the angle converter exits, and a reflection section that reflects the light incident via the light incident section toward the light exiting section, a refractive index of an interior of the angle converter is greater than a refractive index of air, a refractive index of an interior of the light guiding member is greater than the refractive index of the interior of the angle converter, the light exiting end surface and part of the side surface are in contact with the angle converter, the light guiding member is a wavelength conversion member that converts the light incident thereon into light having a converted wavelength band different from a wavelength band of the incident light, and characterized in that the light guiding member includes a first antireflection film and a second antireflection film, the first antireflection film is configured to prevent reflection of the wavelength band of the incident light and is formed on a first portion of the side surface that is a portion not buried in the light incident section, and the second antireflection film is configured to prevent reflection of the converted wavelength band and is formed on a second portion of the side surface that is a portion buried in the light incident section and on the light exiting end surface. a light guiding member that light enters; and an angle converter that the light from the light guiding member enters, wherein the light guiding member has a side surface and a light exiting end surface which intersects the side surface and via which the light exits, the angle converter includes a light incident section on which the light from the light guiding member is incident, a light exiting section via which the light incident on the angle converter exits, and a reflection section that reflects the light incident via the light incident section toward the light exiting section, a light incident section on which the light from the light guiding member is incident, a light exiting section via which the light incident on the angle converter exits, and a reflection section that reflects the light incident via the light incident section toward the light exiting section, a refractive index of an interior of the angle converter is greater than a refractive index of air, a refractive index of an interior of the light guiding member is greater than the refractive index of the interior of the angle converter, the light exiting end surface and part of the side surface are in contact with the angle converter, the light guiding member is a wavelength conversion member that converts the light incident thereon into light having a converted wavelength band different from a wavelength band of the incident light, and characterized in that the light guiding member includes a first antireflection film and a second antireflection film, the first antireflection film is configured to prevent reflection of the wavelength band of the incident light and is formed on a first portion of the side surface that is a portion not buried in the light incident section, and the second antireflection film is configured to prevent reflection of the converted wavelength band and is formed on a second portion of the side surface that is a portion buried in the light incident section and on the light exiting end surface.