A hairbrush comprising: a head portion having a brush surface on which rod-like protrusions (15, 16, 17) are provided in a standing manner; and a handle, wherein: the brush surface has a longitudinal direction and a width direction orthogonal to the longitudinal direction; a first protrusion region is provided in a central portion, in the width direction, of the brush surface, the first protrusion region including first protrusions (15, 17) spaced apart from one another, each of the first protrusions (15, 17) being provided singly and independently; and one or more second protrusion rows are provided on each of both sides sandwiching the first protrusion region in the width direction, each of the second protrusion rows including a plurality of second protrusions formed along the longitudinal direction, each of the second protrusions having a greater maximum value of cross-sectional area than the first protrusion and having a shorter length than the first protrusions; characterized in that the first protrusions (15, 17) comprise first small protrusions and first large protrusions having mutually different maximum values of cross-sectional areas, the maximum value of the cross-sectional area of the first large protrusions being larger than the maximum value of the cross-sectional area of the first small protrusions and smaller than the maximum value of the cross-sectional area of the second protrusions 16); and in that the first protrusion region includes: first small protrusion rows each including a plurality of the first small protrusions arranged in a line in the longitudinal direction; and at least one first large protrusion row including a plurality of the first large protrusions arranged in a line in the longitudinal direction, and being formed more toward outside in the width direction than a region where the first small protrusion rows are formed. a head portion having a brush surface on which rod-like protrusions (15, 16, 17) are provided in a standing manner; and a handle, wherein: the brush surface has a longitudinal direction and a width direction orthogonal to the longitudinal direction; a first protrusion region is provided in a central portion, in the width direction, of the brush surface, the first protrusion region including first protrusions (15, 17) spaced apart from one another, each of the first protrusions (15, 17) being provided singly and independently; and one or more second protrusion rows are provided on each of both sides sandwiching the first protrusion region in the width direction, each of the second protrusion rows including a plurality of second protrusions formed along the longitudinal direction, each of the second protrusions having a greater maximum value of cross-sectional area than the first protrusion and having a shorter length than the first protrusions; the brush surface has a longitudinal direction and a width direction orthogonal to the longitudinal direction; a first protrusion region is provided in a central portion, in the width direction, of the brush surface, the first protrusion region including first protrusions (15, 17) spaced apart from one another, each of the first protrusions (15, 17) being provided singly and independently; and one or more second protrusion rows are provided on each of both sides sandwiching the first protrusion region in the width direction, each of the second protrusion rows including a plurality of second protrusions formed along the longitudinal direction, each of the second protrusions having a greater maximum value of cross-sectional area than the first protrusion and having a shorter length than the first protrusions; the first protrusions (15, 17) comprise first small protrusions and first large protrusions having mutually different maximum values of cross-sectional areas, the maximum value of the cross-sectional area of the first large protrusions being larger than the maximum value of the cross-sectional area of the first small protrusions and smaller than the maximum value of the cross-sectional area of the second protrusions 16); and in that the first protrusion region includes: first small protrusion rows each including a plurality of the first small protrusions arranged in a line in the longitudinal direction; and at least one first large protrusion row including a plurality of the first large protrusions arranged in a line in the longitudinal direction, and being formed more toward outside in the width direction than a region where the first small protrusion rows are formed. first small protrusion rows each including a plurality of the first small protrusions arranged in a line in the longitudinal direction; and at least one first large protrusion row including a plurality of the first large protrusions arranged in a line in the longitudinal direction, and being formed more toward outside in the width direction than a region where the first small protrusion rows are formed.