A method for manufacturing coke comprising: a preparing step of blending two or more coal brands to prepare a coal blend; a stirring and mixing step of stirring and mixing the coal blend which has been prepared in the preparing step to disintegrate at least a part of pseudo-particles that have been formed by agglomeration of coal particles in the coal blend; and a carbonizing step of charging the stirred and mixed coal blend into a coke oven to carbonize the stirred and mixed coal blend, wherein a mixing apparatus is used in the stirring and mixing step, the mixing apparatus having a capability of controlling degree of mixing of the coal blend to be 0.85 or more at 60 seconds after start of a mixing operation, the degree of mixing being calculated by a following equation: degree of mixing = σ TS 0 − σ TS / σ TS 0 − σ TSf where the degree of mixing is a value calculated from the standard deviations of sulfur concentrations which are respectively determined for the samples taken from the stirred and mixed coal blend, σTS 0 denotes the standard deviation of sulfur concentrations when mixing is not performed at all, σTSf denotes the standard deviation of sulfur concentrations when mixing has been completely performed, σTS denotes the standard deviation of sulfur concentrations of the samples taken, wherein the coal blend is stirred and mixed in the stirring and mixing step so that the degree of mixing is 0.85 or more and the degree of mixing is a value calculated from the standard deviations of sulfur concentration which are respectively determined for the samples having a weight of 2 g or less, the samples being taken from plural positions of the stirred and mixed coal blend. a preparing step of blending two or more coal brands to prepare a coal blend; a stirring and mixing step of stirring and mixing the coal blend which has been prepared in the preparing step to disintegrate at least a part of pseudo-particles that have been formed by agglomeration of coal particles in the coal blend; and a carbonizing step of charging the stirred and mixed coal blend into a coke oven to carbonize the stirred and mixed coal blend, wherein a mixing apparatus is used in the stirring and mixing step, the mixing apparatus having a capability of controlling degree of mixing of the coal blend to be 0.85 or more at 60 seconds after start of a mixing operation, the degree of mixing being calculated by a following equation: degree of mixing = σ TS 0 − σ TS / σ TS 0 − σ TSf where the degree of mixing is a value calculated from the standard deviations of sulfur concentrations which are respectively determined for the samples taken from the stirred and mixed coal blend, σTS 0 denotes the standard deviation of sulfur concentrations when mixing is not performed at all, σTSf denotes the standard deviation of sulfur concentrations when mixing has been completely performed, σTS denotes the standard deviation of sulfur concentrations of the samples taken, wherein the coal blend is stirred and mixed in the stirring and mixing step so that the degree of mixing is 0.85 or more and the degree of mixing is a value calculated from the standard deviations of sulfur concentration which are respectively determined for the samples having a weight of 2 g or less, the samples being taken from plural positions of the stirred and mixed coal blend. where the degree of mixing is a value calculated from the standard deviations of sulfur concentrations which are respectively determined for the samples taken from the stirred and mixed coal blend, σTS 0 denotes the standard deviation of sulfur concentrations when mixing is not performed at all, σTSf denotes the standard deviation of sulfur concentrations when mixing has been completely performed, σTS denotes the standard deviation of sulfur concentrations of the samples taken, wherein the coal blend is stirred and mixed in the stirring and mixing step so that the degree of mixing is 0.85 or more and the degree of mixing is a value calculated from the standard deviations of sulfur concentration which are respectively determined for the samples having a weight of 2 g or less, the samples being taken from plural positions of the stirred and mixed coal blend.