A method for producing H-shaped steel, the method comprising: a rough rolling step; an intermediate rolling step; and a finish rolling step, wherein: the rough rolling step comprises: an edging rolling step of rolling and shaping a material to be rolled into a predetermined almost dog-bone shape; and a flat rolling step of performing rolling of a web part by rotating the material to be rolled after completion of the edging rolling step by 90° or 270°; a thickness of the web part rolled in the flat rolling step is set to a predetermined thickness thicker than a web part thickness when the intermediate rolling step is started; characterized in that a rectangular cross-section slab having a thickness of 290 mm or more and 310 mm or less is used as a raw material; upper and lower caliber rolls of at least one caliber of calibers configured to perform the flat rolling step comprise recessed parts (85a, 86a) configured to form a raised part at a middle of the web part of the material to be rolled, the recessed parts (85a, 86a) being provided at roll barrel length middle parts of the upper and lower caliber rolls; and a width of the raised part formed in the flat rolling step is set to 25% or more and 50% or less of a web part inner size of the material to be rolled. a rough rolling step; an intermediate rolling step; and a finish rolling step, wherein: the rough rolling step comprises: an edging rolling step of rolling and shaping a material to be rolled into a predetermined almost dog-bone shape; and a flat rolling step of performing rolling of a web part by rotating the material to be rolled after completion of the edging rolling step by 90° or 270°; a thickness of the web part rolled in the flat rolling step is set to a predetermined thickness thicker than a web part thickness when the intermediate rolling step is started; characterized in that a rectangular cross-section slab having a thickness of 290 mm or more and 310 mm or less is used as a raw material; upper and lower caliber rolls of at least one caliber of calibers configured to perform the flat rolling step comprise recessed parts (85a, 86a) configured to form a raised part at a middle of the web part of the material to be rolled, the recessed parts (85a, 86a) being provided at roll barrel length middle parts of the upper and lower caliber rolls; and a width of the raised part formed in the flat rolling step is set to 25% or more and 50% or less of a web part inner size of the material to be rolled. the rough rolling step comprises: an edging rolling step of rolling and shaping a material to be rolled into a predetermined almost dog-bone shape; and a flat rolling step of performing rolling of a web part by rotating the material to be rolled after completion of the edging rolling step by 90° or 270°; a thickness of the web part rolled in the flat rolling step is set to a predetermined thickness thicker than a web part thickness when the intermediate rolling step is started; characterized in that a rectangular cross-section slab having a thickness of 290 mm or more and 310 mm or less is used as a raw material; upper and lower caliber rolls of at least one caliber of calibers configured to perform the flat rolling step comprise recessed parts (85a, 86a) configured to form a raised part at a middle of the web part of the material to be rolled, the recessed parts (85a, 86a) being provided at roll barrel length middle parts of the upper and lower caliber rolls; and a width of the raised part formed in the flat rolling step is set to 25% or more and 50% or less of a web part inner size of the material to be rolled.