To provide a method for efficiently producing a cyclopentyl alcohol compound by causing water to react with a cyclopentene compound under a specific reaction condition.

The production method of a cyclopentyl alcohol compound represented by formula (1a) or (1b) comprises causing water to react with a cyclopentene compound represented by formula (2), where the reaction is carried out at a reaction temperature of 180-600C under reaction pressure of 5-1,000 MPa without using a catalyst.