The purpose of this study was to survey on the actual condition disposable coveralls of railroad rolling stock maintenance workers. The data were obtained from 100 male workers of railroad rolling stock maintenance wearing disposable coveralls using a questionnaire. The results were as follows. Disposable coveralls were exchanged into new ones in a week or 1-2 weeks. The major reasons of the exchanges were ＇Because it was contaminated(76.2%)＇ and then ＇It was torn(23.0%)＇ The response to the wearing frequency was the highest in ＇As possible as freqeuntly＇, and then ＇Sometimes＇ When workers were reluctant to wear the coveralls, the first reason was heat owing to wearing the coveralls. Therefore, wearing frequency became lowered in Summer. The torn parts of disposable coveralls most frequently were around the armhole and the crotch. The contaminated parts followed with the cuffs, the arm, and then the back. The uncomfortable parts were around the neck and the armholes. Workers felt uncomfortable because of heat and sweat caused by garment design obstructed convective airflow. Second, they complained that the coveralls make them irritated in a toilet. Third, they dissatisfied with materials of coveralls because the soils like oil were soaked into the coveralls and stained on the inner clothing. In regard of the color of coveralls, worker＇s favorite color was blue. In regard of style, the preferences to the separate style with a hood and the coveralls style with a hood were 49.0% and 25.0%, respectively.