An alicyclic epoxy resin which is solid at ordinary temperature, has excellent transparency, and is suitable for use in optical materials, coating materials, etc. The alicyclic epoxy resin satisfies the following requirements (a) to (d): (a) to have an epoxy equivalent of 500 to 10,000; (b) to have a degree of nucleus hydrogenation of 96% or higher; (c) to have a softening temperature, as measured by the ring-and-ball method as provided for in JIS-K-7234, of 40 to 200‹C; and (d) to have a light transmittance, as measured at a wavelength of 400 nm, of 90% or higher. ® KIPO & WIPO 2007
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