Provided is a hair oil that, when applied to the hair, is capable of imparting flexibility, lightness, moistness, easiness in setting, luster, etc., and that is unlikely to drip off when dispensed in the hand, and exhibits excellent extensibility. The present invention provides a hair oil comprising a thickening agent (A) and an oil solution (B), wherein a compound represented by formula (1) is included as the thickening agent (A) in an amount of 0.5-30.0 wt% with respect to the total content of the thickening agent (A) and the oil solution (B), and the content of the oil solution (B) accounts for 70.0-99.5 wt% of the total content of the thickening agent (A) and the oil solution (B).本發明提供一種毛髮油，其係藉由應用於毛髮，而可賦予順滑性、輕盈性、潤澤感、易梳理性、及光澤感等者，且於取至手上時不易滴落，延展性優異。本發明提供一種毛髮油，其係含有增黏劑（A）與油劑（B）者，並且相對於增黏劑（A）與油劑（B）之含量之和而包含0.5～30.0重量%之下述式（1）所表示之化合物作為增黏劑（A），且相對於增黏劑（A）與油劑（B）之含量之和而包含70.0～99.5重量%之油劑（B）。
