Provided is an interlayer film for laminated glass with which both the reflected double images and the transmitted double images can be suppressed in the laminated glass. An interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass used for laminated glass that is a head-up display, in which the interlayer film includes a region for display corresponding to a display region of the head-up display, the interlayer film has one end and the other end on the opposite side of the one end, the other end has a thickness larger than a thickness of the one end, an absolute value of difference between a maximum value of measured values of variation in thickness and a minimum value of measured values of variation in thickness is 32 μm or less when the variation in thickness is measured in a distance of 80 mm centered at points of every 2 mm intervals in a direction connecting the one end and the other end in the region for display from the one end to the other end, and a region of the other end side from the region for display has a wedge angle that is smaller than a wedge angle of the region for display.