The purpose of the present paper is to examine experimentally relationship between the drag reduction of the two-dimensional square prism body and its near wake due to the cutout of its front edges. The mean velocity and the velocity fluctuation are measured by the hot wire anemometer with I type and X type probes. The present experiment shows: (1) There are typical three patterns of the velocity fluctuation against the cutout dimensions, which are almost the same as of the drag reduction shown in previous work. (2) The length of the dead water region of the near wake around the square prism with the cutout is related with the profile of the velocity fluctuation. (3) The decrease of total velocity fluctuation energy on the cross-area of the near wake reduces the drag coefficient of the square prism with the cutout.