To allow a moving picture compression coder and a moving picture compression decoder to detect a motion of a picture.

A motion vector 25, luminance template data 22', and prediction image data 26 which are generated from an input image by a motion vector detection circuit 2 for each macro block are fed to a motion compensation circuit 3, which generates motion compensation data 29 to be coded for each macro block on the basis of image type information 21 and an intra/non-intra discrimination result 24. The motion compensation data 29 are coded in circuits after a DCT circuit 5 and also fed to a motion abnormity detection circuit 12, which produces motion defect detection result data 20 that denote whether or not in which division area divided by are division data 19 from an intra macro block as to P, B pictures a motion is in existence on the basis of an area division data 19, a local motion error strength setting value 17 and a global motion error strength setting value 18.