An NK cell showing higher cytotoxic activity is provided. An object of the present invention is to provide a pharmaceutical composition for NK cell therapies expected to be highly effective. The present invention provides an NK cell having the following characteristics of (1) and (2) or a population thereof: (1) the NK cell is CD16-positive, highly expresses CD56, and is CD57-negative, and (2) the NK cell is NKG2C-positive, is NKG2A-negative or lowly expresses NKG2A, and is CD94-positive. The present invention also provides a pharmaceutical composition containing a population of such NK cells, and a therapeutically effective amount of antibodies.