High strength steel sheet having a tensile strength of 800 MPa or more comprising a middle part in sheet thickness and a soft surface layer arranged at one side or both sides of the middle part in sheet thickness, wherein each soft surface layer has a thickness of more than 10 μm and 30% or less of the sheet thickness, the soft surface layer has an average Vickers hardness of 0.60 times or less than the average Vickers hardness of the sheet thickness 1/2 position, and the soft surface layer has a nano-hardness standard deviation of 0.8 or less, and wherein the middle part in sheet thickness comprises, by mass%, C: 0.05 to 0.8%, Si: 0.01 to 2.50%, Mn: 0.010 to 8.0%, P: 0.1% or less, S: 0.05% or less, Al: 0 to 3%, and N: 0.01% or less, optionally further comprises, by mass%, at least one element selected from the group consisting of: Cr: 0.01 to 3%, Mo: 0.01 to 1%, and B: 0.0001% to 0.01%, at least one element selected from the group consisting of: Ti: 0.01 to 0.2%, Nb: 0.01 to 0.2%, and V: 0.01 to 0.2%, at least one element selected from the group consisting of: Cu: 0.01 to 1%, and Ni: 0.01 to 1%, and/or O: 0.001 to 0.02%, W: 0.001 to 0.1%, Ta: 0.001 to 0.1%, Sn: 0.001 to 0.05%, Sb: 0.001 to 0.05%, As: 0.001 to 0.05%, Mg: 0.0001 to 0.05%, Ca: 0.001 to 0.05%, Zr: 0.001 to 0.05%, and/or REM (rare earth metals) such as Y: 0.001 to 0.05%, La: 0.001 to 0.05% and Ce: 0.001 to 0.05%, and a balance of Fe and unavoidable impurities. C: 0.05 to 0.8%, Si: 0.01 to 2.50%, Mn: 0.010 to 8.0%, P: 0.1% or less, S: 0.05% or less, Al: 0 to 3%, and N: 0.01% or less, optionally further comprises, by mass%, at least one element selected from the group consisting of: Cr: 0.01 to 3%, Mo: 0.01 to 1%, and B: 0.0001% to 0.01%, at least one element selected from the group consisting of: Ti: 0.01 to 0.2%, Nb: 0.01 to 0.2%, and V: 0.01 to 0.2%, at least one element selected from the group consisting of: Cu: 0.01 to 1%, and Ni: 0.01 to 1%, and/or O: 0.001 to 0.02%, W: 0.001 to 0.1%, Ta: 0.001 to 0.1%, Sn: 0.001 to 0.05%, Sb: 0.001 to 0.05%, As: 0.001 to 0.05%, Mg: 0.0001 to 0.05%, Ca: 0.001 to 0.05%, Zr: 0.001 to 0.05%, and/or REM (rare earth metals) such as Y: 0.001 to 0.05%, La: 0.001 to 0.05% and Ce: 0.001 to 0.05%, and a balance of Fe and unavoidable impurities. Cr: 0.01 to 3%, Mo: 0.01 to 1%, and B: 0.0001% to 0.01%, at least one element selected from the group consisting of: Ti: 0.01 to 0.2%, Nb: 0.01 to 0.2%, and V: 0.01 to 0.2%, at least one element selected from the group consisting of: Cu: 0.01 to 1%, and Ni: 0.01 to 1%, and/or O: 0.001 to 0.02%, W: 0.001 to 0.1%, Ta: 0.001 to 0.1%, Sn: 0.001 to 0.05%, Sb: 0.001 to 0.05%, As: 0.001 to 0.05%, Mg: 0.0001 to 0.05%, Ca: 0.001 to 0.05%, Zr: 0.001 to 0.05%, and/or REM (rare earth metals) such as Y: 0.001 to 0.05%, La: 0.001 to 0.05% and Ce: 0.001 to 0.05%, and a balance of Fe and unavoidable impurities. Ti: 0.01 to 0.2%, Nb: 0.01 to 0.2%, and V: 0.01 to 0.2%, at least one element selected from the group consisting of: Cu: 0.01 to 1%, and Ni: 0.01 to 1%, and/or O: 0.001 to 0.02%, W: 0.001 to 0.1%, Ta: 0.001 to 0.1%, Sn: 0.001 to 0.05%, Sb: 0.001 to 0.05%, As: 0.001 to 0.05%, Mg: 0.0001 to 0.05%, Ca: 0.001 to 0.05%, Zr: 0.001 to 0.05%, and/or REM (rare earth metals) such as Y: 0.001 to 0.05%, La: 0.001 to 0.05% and Ce: 0.001 to 0.05%, and a balance of Fe and unavoidable impurities. Cu: 0.01 to 1%, and Ni: 0.01 to 1%, and/or O: 0.001 to 0.02%, W: 0.001 to 0.1%, Ta: 0.001 to 0.1%, Sn: 0.001 to 0.05%, Sb: 0.001 to 0.05%, As: 0.001 to 0.05%, Mg: 0.0001 to 0.05%, Ca: 0.001 to 0.05%, Zr: 0.001 to 0.05%, and/or REM (rare earth metals) such as Y: 0.001 to 0.05%, La: 0.001 to 0.05% and Ce: 0.001 to 0.05%, and a balance of Fe and unavoidable impurities.