PROBLEM TO BE SOLVED: To provide an underwear for working in a mountain forest which eliminates bee sting damage to enable a worker to comfortably continue his/her work.SOLUTION: A resilient material absorbing no sweat is reticulated as shown in Fig.1, and protrusions 1b for reducing its contact areas to the skin and keeping its thickness of approximately 15 mm, are formed on its rear. This reticulated material is employed for forming the underwear for working. The underwear is equipped with a channel 3a to which flowing sweat is guided to be collected, and a nipple 3b through which the flowing sweat is collected in a bag 3c is prepared at an end of the channel 3a. This configuration provides a gumless and comfortable feeling thanks to the sweat collection. By further wearing a workwear on this underwear for working, the resilient material with a thickness of approximately 15 mm protects a worker body. The underwear for working serving as a protective wear through which stings of a mosquito, horsefly, and hornet do not reach the skin of a worker, is provide.