To provide a pair of hair trimming thinning scissors which allows anybody comb the hair finely and nicely without causing incision in the middle with no need for any proficient technique and can easily reduce the amount of cut to a considerable degree below 10%.

A pair of hair trimming thinning scissors is composed of a comb-shape blade 10 provided with a large number of blades 12 arranged in a line in a pectinate state connected with a straight blade in an openable and closable manner through a pivot shaft. The end blade section 12a of each of the combtooth-shaped blades 12 on the comb-shape blade 10 forms a groove-shape notch at substantially the center of the width direction of the blade and obliquely forms a chamfering on both sides 12d, 12d, of the width direction of the blade. Both sides 12c, 12c of the bifurcated section by the cutout groove 12b are gradually tapered towards the end.