To provide an excellent curable composition excellent in a hydrosilylation reaction curing property and cured to give a rubbery elastic material (elastomer), in which a resulting cured product has reduced surface adhesiveness.

The curable composition, which is cured to give a rubbery elastic material, essentially comprises only (A) an organopolysiloxane having, in one molecule, at least three silicon atom-bound alkenyl groups, (B) an organohydrogen polysiloxane having, in one molecule, at least two silicon atom-bonded hydrogen atoms and a polyether group bound to a silicon atom through an alkylene bond, in such an amount that the hydrogen atoms bound to the silicon atom contained in this component is 0.1 to 10 moles per one mole of the alkenyl group in the component (A), (C) an effective amount of a hydroxilylation reaction curing catalyst, and (D) one or more members selected from inhibitor compounds, fillers, conductivity imparting agents, heat resistance imparting agents, flame resistance imparting agents, thixotropy imparting agents, pigments, and dyes.

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