It is easy to see that the oscillatory factor e~(λP(x,y)) makes it impossible to establish the weighted norm inequality of the oscillatory integral operators (1.1) by the method as in the case of Calderon-Zygmund operators. The purpose of this note is to establish the weighted norm inequality of (1, 1) by the aid of interpolation of operators with change of measures (see [3] ). Let us now state a general result.