A pair of industrial safety glasses comprises: a glasses frame comprising: a connection means connected to each of both ends thereof; a first coupling part on at least one of the connection means; and a second coupling part corresponding to the first coupling part for coupling thereto; and a wearing means having two ends respectively connected to two ends of the connection means, and the wearing means comprising an adjustable unit so as to adjust the length of the wearing means for being suitable for different workers having different sized heads.