We report here on the blue electroluminescence from InN@SiO2 nanomaterials prepared by growing InN semiconductor nanocrystals on silica nanoparticles. A blue electroluminescence was observed at 460 nm from a light-emitting device using InN@SiO2 nanomaterials as emission layer. The blue emission remained almost unchanged at different driving voltages. The electroluminescence measurements on various control devices prove that the blue emission is indeed from the InN@SiO2 nanomaterials. The InN@SiO2-based single-layer device emitted almost pure blue light with CIE coordinates of 0.18, 0.23, demonstrating a potential application in electroluminescent devices.