Abstract: Disclosed are an image-inspection apparatus and an image-inspection method for a welded portion, capable of certainly pinpointing a joining interface of the welded portion. An image-inspection apparatus (100) for inspecting condition of a welded portion (W) where rectangular copper wires (21 and 22) are welded to each other, including a first camera (51) for taking an image of the welded portion (W) from a tangential direction, a second camera (52) for taking an image of the welded portion (W) from the radial outside, and a controller (50). The controller (50) pinpoints a position of a joining interface (J) from the image taken from the tangential direction, calculates a width of a welding ball (B) at the pinpointed position from the image taken front the radial outside, and inspects the condition of the welded portion (NV) based on the calculated width.