The data is the two-dimensional flow field data in the wake of the finite wall-mounted square cylinder whose aspect ratio equals 4 and the Reynolds number is 500 based on the width of the bluff body. The data is collected from the Particle Image Velocimetry experiments in a wind tunnel and processed by Insight4G software. The data is shown in 4 different plane locations which are shown in the figure. Three of the planes are horizontal planes behind the bluff body from the wall to the free end and another one is located at the longitude central plane of the bluff body.