PURPOSE: To produce an alcohol derivative important as a raw material for medicines, agricultural agent, functional material, etc., and having a difluoromethyl group at a position.

CONSTITUTION: The objective alcohol derivative expressed by the formula R1R2C (OSiR3R4R5)-CF2H or the formula R1R2C(OH)-CF2H (R1 and R2 are each independently hydrogen atom or alkyl group, aromatic group, aralkyl group, alkenyl group or alkynyl group which may have substituent or R1 and R2 together may form a ring; R3, R4 and R5 are each independently alkyl group or aromatic group) and having a difluoromethyl group at α position is produced by reacting a carbonyl compound expressed by the formula R1R2C=O with a difluoromethylsilanes of the formula R3R4R5Si-CF2H in the presence of a fluoride ion source. Thereby, the alcohol derivative having difluoromethyl group at α-position can simply be synthesized.