A semiconductor light emitting element that outputs emitted light having a predetermined emitted light peak wavelength λ includes: at least a substrate; a lower distributed Bragg reflector layer provided on the substrate; and a light emitting layer provided on the lower distributed Bragg reflector layer. At least one phase changing layer having a thickness of mλ/2n (wherein n is the refractive index of the phase changing layer, and m is an integer 1 or greater) is provided within the lower distributed Bragg reflector layer.