Even when a pasting target body to which prepregs are pasted has a shape changed portion such as a curved portion, prepreg pasting states are accurately inspected. A prepreg pasting state inspection apparatus for inspecting a gap between adjacent prepregs on a pasting target body has a laser for emitting slit light along an inclined plane so that a projected pattern of the slit light is formed across the adjacent prepregs, a camera for imaging an irradiation region of the laser, and a control unit for determining whether the gap between the adjacent prepregs is within an allowance based on a signal from the camera. The apparatus also has a range sensor for measuring a distance between a reference position and the irradiation region, and focus adjusting units for adjusting focus positions of the camera and the laser based on the signal from the range sensor.