Provided is a laser fusing method for a glass sheet, including: cutting the glass sheet (G) by irradiating the glass sheet (G) with a laser (L) from a front surface (S) side thereof along a preset cutting line (X) extending in a surface direction of the glass sheet (G); and jetting a shaping gas (A3) so as to form a flow along at least one of the front surface (S) and a back surface (B) of the glass sheet (G), the shaping gas (A3) passing through an irradiation portion (C) of the laser (L).