A grain-oriented electrical steel sheet to which electron beam irradiation is applied, has a film and a thickness of t (mm), wherein no rust is produced on a surface of the steel sheet after a humidity cabinet test lasting 48 hours at a temperature of 50° C. in an atmosphere of 98% humidity, and iron loss W17/50 after the electron beam irradiation is reduced by at least (−500 t2+200 t−6.5) % of the iron loss W17/50 before the electron beam irradiation and is (5 t2−2 t+1.065) W/kg or less.