A liquid finishing agent composition for textile products which comprises (A) a specific modified silicone, (B) a specific amine compound quaternized with methyl chloride, and (C) pentaerythritol monostearate, the (A)/(B) ratio being 30/70 by weight. It imparts preferable softness to textile products such as fibers and clothes. It further has the effect of diminishing wrinkles caused by laundering, while maintaining the drape and stiffness of the textile products.