A high-strength cold rolled steel sheet having a tensile strength of 900 MPa or more, a total elongation of 20 % or more, and a yield ratio of 60 % or more, and comprising: a chemical composition containing, in mass%, C: 0.15 % to 0.35 %, Si: 1.0 % to 2.0 %, Mn: 1.8 % to 3.5 %, P: 0.020 % or less, S: 0.0040 % or less, Al: 0.01 % to 0.1 %, and N: 0.01 % or less, with a balance consisting of Fe and inevitable impurities; and a steel structure composed of, in area ratio, ferrite: 30 % to 75 %, martensite: 15 % to 40 %, retained austenite: 10 % to 30 %, optionally carbides, and optionally inclusions, the total content of carbides and inclusions being 1 % or less, wherein a mode of the crystal grain circularity of the retained austenite is 0.6 or less, the mode of the crystal grain circularity being a class value corresponding to the maximum number of crystal grains in a distribution of crystal grain circularity of the retained austenite represented by a histogram with a class range of more than 0.1 × (n - 1) and 0.1 × n or less and a class value of 0.1 × n where n is an integer from 1 to 10, and circularity of each crystal grain of the retained austenite is calculated for 1000 crystal grains according to the following formula: circularity = 4 ⁢ π ⁢ S / L 2 where S is an area of the crystal grain of the retained austenite, and L is a perimeter of the crystal grain of the retained austenite, the structure observation for determining the area ratios of ferrite, martensite and retained austenite and for determining the mode of the crystal grain circularity of the retained austenite being performed at a position of 1/4 of the sheet thickness using a field emission scanning electron microscope FE-SEM. a chemical composition containing, in mass%, C: 0.15 % to 0.35 %, Si: 1.0 % to 2.0 %, Mn: 1.8 % to 3.5 %, P: 0.020 % or less, S: 0.0040 % or less, Al: 0.01 % to 0.1 %, and N: 0.01 % or less, with a balance consisting of Fe and inevitable impurities; and a steel structure composed of, in area ratio, ferrite: 30 % to 75 %, martensite: 15 % to 40 %, retained austenite: 10 % to 30 %, optionally carbides, and optionally inclusions, the total content of carbides and inclusions being 1 % or less, wherein a mode of the crystal grain circularity of the retained austenite is 0.6 or less, the mode of the crystal grain circularity being a class value corresponding to the maximum number of crystal grains in a distribution of crystal grain circularity of the retained austenite represented by a histogram with a class range of more than 0.1 × (n - 1) and 0.1 × n or less and a class value of 0.1 × n where n is an integer from 1 to 10, and circularity of each crystal grain of the retained austenite is calculated for 1000 crystal grains according to the following formula: circularity = 4 ⁢ π ⁢ S / L 2 where S is an area of the crystal grain of the retained austenite, and L is a perimeter of the crystal grain of the retained austenite, the structure observation for determining the area ratios of ferrite, martensite and retained austenite and for determining the mode of the crystal grain circularity of the retained austenite being performed at a position of 1/4 of the sheet thickness using a field emission scanning electron microscope FE-SEM. <EOS>