To provide an electlet having high electric charge density on the surface under normal or high temperature and with superior holding ability of the electric charge density, especially to provide an electlet with superior collecting ability for collecting minute dust or the like, when it is used for air filter.

This electlet is a resin composition having a specific cyclic hydrocarbon base polymer (A) and denatured high polymer compound (B), which is subjected to graft copolymerization is co-polymerized to a high polymer compound.