Abstract: A two-way delivery valve structure of a fuel discharge valve in a fuel injection pump has a valve holder formed in an interior part thereof with an oil chamber communicating with a fuel injection pipe, a valve seat secured in the holder and formed in an interior part thereof with a fuel outlet conduit communicating with a pressure chamber, an discharge valve communicating with the pressure chamber and for engaging with and disengaging from an opening of the fuel outlet conduit so as to open and close the conduit, and a two-way delivery valve mounted to the fuel discharge valve and provided in an interior part thereof with a valve chest communicating with the fuel discharge valve, the two-way delivery valve being provided in the valve chest with a movable valve comprising a check valve for opening and closing a communicating portion communicating with the oil chamber, a valve casing constituting the two-way delivery valve being provided separately from the fuel discharge valve, the valve casing and fuel discha