To provide a distributor type injection pump furnished with a distributing shaft 10, on which the distributing shaft 10 rotates in a bearing 14, improved from a distributor type injection pump in a form having a distributing groove 22, improving lubrication of an aeromechanical sliding support and capable of providing high safety against corrosion of the distributing shaft.

A distributing shaft 10 is furnished with lubricant grooves 24, 26 extending in the axial direction on an outer peripheral surface, lubricant grooves 24, 26 open to an end surface of the distributing shaft 10 and extend to a ring chamber, the ring chamber is formed on a bearing 14, and fuel under feed pressure is supplied to the ring chamber.