In this work we present some results concerning the growth and the structural and opti- cal characterizations of ZnSe nanocrystals dispersed in KBr matrix. The growth of the samples was carried out by the Czochralski method and the incorporation of the ZnSe semiconductor nanocrystallites was realised in the liquid phase of the matrix. The introduction of ZnSe crystallites into the matrix was revealed by the X-ray diffraction. The UV-visible optical absorption measurement showed a displacement of the absorption threshold of the sample towards high energies (short wavelengths) as compared to the ZnSe bulk crystal one. This shift is due to the quantum confinement effect induced by size reduction.