PURPOSE: To provide a means capable of judging accurately the quality of solder to adhere an electrode of a micro electronic part, such as, particularly, a microscopic capacitor chip onto a substrate.

CONSTITUTION: An external appearance inspecting device is composed of the first light source 6 to radiate light from above toward an electronic part 5 soldered onto a substrate 1, the second light source 6 to radiate light from the oblique upper direction toward the length direction N of this electronic part 5 and a camera 8 arranged in the oblique upper direction on the opposite side of this second light source 7 so as to observe this electronic part 5.