STEEL SHEET AND STEEL SHEET MANUFACTURING METHOD

This steel sheet has a predetermined chemical composition, at a depth position of 1/4 of a sheet thickness from a surface, an area fraction of GAM0.5-1.7 is 50% or more and 100% or less, an area fraction of GAM>1.7 is 0% or more and 20% or less, an area fraction of GAM≤0.5 is 0% or more and less than 50%, an area fraction of residual austenite is 0% or more and less than 4%, a total area fraction of the residual austenite, fresh martensite, cementite and pearlite is 0% or more and 10% or less, an average grain size is 15.0 µm or less, an average dislocation density is 1.0 × 1014 /m2 or more and 4.0 × 1015 /m2 or less, a total of pole densities of {211} and {332} in a thickness middle portion is 12.0 or less, and a tensile strength is 980 MPa or more.