PURPOSE: To provide a grain-oriented silicon steel sheet low in loss and to provide its production method.

CONSTITUTION: (1) This is a grain-oriented silicon steel sheet contg. ≤0.01% C, 1.5 to 4.0% Si, 1.0 to 6.0% Mn, ≤0.01% S, 0.003 to 0.030% 0.030% acid soluble Al, 0.010% N and 0.05 to 0.030% Sn and satisfying [Si(%)-0.5×Mn(%)] ≤2.0, and the balance Fe with inevitable impurities. (2) This is the production method for the grain-oriented silicon steel sheet in which the slab having the compsn. in (1) (N:0.001 to 0.010%) is treated by the following stages: the stage in which hot rolling is executed; the stage in which, as hot-rolled or after being annealed after the hot rolling, it is subjected to cold rolling for one time or two times including process annealing; the stage in which primary recrystallization is generated by continuous annealing; the stage in which secondary recrystallization is generated by holding it in the temp. range of 825 to 925°C for 7 to 100hr; and the finish annealing stage in which it is succeedingly held in the temp. range of >925 to 1050°C for 4 to 100hr and is purified.