The flow around rectangular cylinders (depth, d; height, h) placed in linear shear is investigated experimentally. A wide range of shear is realized using a wind tunnel of multi-fan type, where a column of fans are driven independently. The base pressure for d/h = 0.2〜2.0 increases with a shear parameter. Particularly for d/h < 0.6, the base pressure is sensitive to the shear parameter.