NOVELTY - A mineral feedstock (105) is contacted with hydrotreating catalyst, and produced hydrotreated effluent is separated into diesel boiling range product (a), hydrotreated liquid slip stream, and gas phase product. The hydrotreated liquid slip stream is mixed with a recycled product stream and biocomponent feed. The obtained mixed input stream is deoxygenated to form diesel boiling range product (b) and recycled product stream. The ratio of hydrotreated liquid stream (123) and biocomponent feed in mixed input stream, is adjusted to obtain diesel fuel product.    USE - Manufacture of diesel fuel product.    ADVANTAGE - The method efficiently and economically provides diesel fuel product by simple method.    DETAILED DESCRIPTION - A mineral feedstock having sulfur content of 500 ppm or more is contacted with a hydrotreating catalyst under effective hydrotreating condition in a hydrotreatment reactor (110) that includes a continuous gas phase to produce hydrotreated effluent. The hydrotreated effluent is separated into diesel boiling range product (a), hydrotreated liquid slip stream having sulfur content of 50 ppm or less, and gas phase product. The hydrotreated liquid slip stream is mixed with a recycled product stream, and biocomponent feed having oxygen content of 8 wt.% or more to form a mixed input stream. The obtained mixed input stream is deoxygenated under effective deoxygenation condition in a deoxygenation stage having a continuous liquid phase environment to form a diesel boiling range product (b) and recycled product stream. The ratio of hydrotreated liquid slip stream and biocomponent feed in the mixed input stream, is adjusted while maintaining content of hydrogen in the mixed input stream in deoxygenation is 5% or more to obtain diesel fuel product.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of reaction system.    Mineral hydrocarbon feedstock (105)    Hydrogen treat gas stream (108)    Hydrotreatment reactor (110)    Hydrotreated feedstock (113)    High pressure separation stage (120)    Hydrotreated liquid stream (123)    Gas-phase stream (124)