Wavelength conversion member and the light emitting device

A can protect the semiconductor nanoparticle phosphor from the effects of air or moisture from the outside, the light emitting device using a semiconductor nanoparticle phosphor, and to provide a wavelength converting member used for the same. A semiconductor nanoparticle phosphor, a wavelength conversion member that is dispersed in a resin containing a constituent unit derived from an ionic liquid having a polymerizable functional group, a wavelength conversion fluorescing by receiving the excitation light member, as well as light emitting device having a corresponding wavelength converting member, the wavelength converting member provided separately, and an excitation light source for emitting excitation light in the wavelength conversion member. .FIELD 1