To provide a cylinder block honing device having excellent productivity while sufficiently suppressing the formation of burrs.

The cylinder block honing device provided with a plurality of fixed grinding wheels 11 and cylindrical rotating grinding wheels 21 alternately arranged at the outer periphery of a honing head 3, rotates the honing head 3 to carry out honing of a surface part of a bore 61 with the fixed grinding wheels 11 and to carry out honing of the surface part of the bore 61 with the grindstones 21 rotated in a reverse rotating direction B to the rotating direction A of the honing head 3 abreast with the honing with the fixed grinding wheels 11. Burrs formed by plastic flow of metal by the honing with the fixed grinding wheels 11 are removed by the grindstones 21 before growing, and burrs formed by plastic flow of metal by the honing with the grindstones 21 are removed by the fixed grinding wheels 11 before growing.