Provided is a control device for opening and closing bodies that, while opening or closing a window glass (7), determines the presence of a foreign object trapped in a window (6) on the basis of variation in the moving speed of the window glass (7) and a threshold value stored in a storage unit (2a), and when determination of trapped foreign matter is made, reverses the drive direction of a motor(9) in order to remove the foreign object, wherein threshold values for determining trapped foreign objects in a specific range (Zc, Zo) in the entire range of motion (Z) for the window glass (7) areupdated by a threshold updating unit (2g) on the basis of the variation in the moving speed of the window glass (7), and the threshold values for determining trapped foreign objects in ranges other than the specific range (Zc, Zo) are predetermined fixed values.