To provide comfortable working clothes having excellent comfortability in wearing, practical strength and good treatability, and suitable for a uniform application such as shop working clothes and field working clothes.

The comfortable working clothes comprises a union cloth having a structural texture of double weaving or multi weaving including a hydrophobic synthetic fiber and a hydrophilic fiber exemplified by an acrylate-based fiber. The front surface side of the union cloth is mainly formed out of the hydrophobic synthetic fiber, and the back surface side thereof is mainly formed out of the yarns containing the hydrophilic fiber. The maximum value of the number of the floating yarns containing the hydrophilic fiber on the back surface is 2-5.