To provide thinning scissors which can cut hair with a smoothly and sharply by reducing the amount of hair to be cut at one time, and wherein two pieces of blade bodies smoothly rub each other, and a risk of damaging hair is reduced.

In these thinning scissors 1, at least one of two pieces of the blade bodies which are pivotally attached is a comb blade body 10 in which a plurality of comb teeth 12 are connected through comb grooves 11. At the blade root section 17 of each comb tooth, a guiding protuberance section 14 is formed in which the blade edge of the comb tooth is projected. A cutting blade line 15 from the blade edge end section 18 of each comb tooth to the base section 14b of the guiding protuberance section is not located on a virtual blade line L1 which connects the base sections of all the comb teeth. At the same time, the blade edge end section is located at a position being lower than the virtual blade line.