Radiation induced crosslinking of hydrogenated acrylonitrile-butadiene rubber (HNBR) is proposed as an alternative to chemical curing methods. HNBR containing 43 % of bound acrylonitrile and differing in hydrogenation degree (> 99.0 or 94.5 mol %) was radiation processed with the 10 MeV electron beam after evacuation and conditioning under argon or in oxygen atmosphere. The results showed that crosslinking density is a linear increasing function of the radiation dose and it is not influenced by the radiation environment and residual double bond content in the irradiated rubber. The radiation yield is about 2.5 crosslinks/100 eV for all investigated rubbers. The estimated gel dose value is varied from 22 to 29 kGy. From the sol-gel analysis it follows that every 100 crosslinking acts are accompanied by the 6-9 chain scission acts (p/q 0.06-0.09).