Inspection device, inspection method, glass plate manufacturing method, and inspection program

According to the invention, the labor cost in size detection of defects generated in the glass plate is reduced, and the detection precision is maintained. An inspection device (1) is provided with: an image acquisition unit (101) for acquiring a captured image obtained by capturing an image of a glass plate; and a size detection unit (103) that detects, as the size of a defect, the size of a range in an estimation result obtained by inputting the captured image into a size detection model (112) that learns the position and range of the defect occurring in the glass plate and estimates the position and range of the defect occurring in the glass plate. 本发明既降低玻璃板中产生的缺陷的尺寸检测中的人力成本又保持检测精度。检查装置(1)包括：图像获取部(101)，获取对玻璃板进行拍摄而成的拍摄图像；以及尺寸检测部(103)，将通过对尺寸检测模型(112)输入拍摄图像得到的推断结果中的范围的尺寸检测为缺陷的尺寸，所述尺寸检测模型(112)是学习了玻璃板中产生的缺陷的位置和范围使得推断玻璃板中产生的缺陷的位置和范围模型。