A plurality of injectors adjacent to one another, each pair of adjacent injectors being mutually connected via a fuel high-pressure pipe (11; 111) which forms a fuel supply passage between adjacent injectors, comprising: one end section serving as a first connecting section (61; 161) to be connected to a fuel supply port of one injector of the adjacent injectors; another end section serving as a second connecting section (62; 162) to be connected to a fuel discharge port of the other injector of the adjacent injectors, wherein the fuel supply port and the fuel discharge port of each of the plurality of injectors are arranged opposite to each other, and wherein the fuel supply ports of the plurality of injectors are directed to the same side, and the first connecting section (61; 161) is connected to the fuel supply port of one injector of the adjacent injectors and the second connecting section is connected to the fuel discharge port of the other injector of the adjacent injectors so that the fuel high-pressure pipe (11,111) is connected between the one injector of the adjacent injectors and the other injector of the adjacent injectors, characterized in that the first connecting section (61; 161) and the second connecting section (62; 162) are formed straight and parallel to each other, and the first connecting section (61; 161) and the second connecting section (62; 162) are formed to have respective connection sides (61a, 62a; 161a, 162a) to be connected to the respective injectors so that the respective connection sides (61a, 62a; 161a, 162a) of the first and second connection sections (61, 62; 161, 162) are directed opposite to each other; and an S-shaped bending section (63; 163) formed between the first connecting section (61; 161) and the second connecting section (62; 162). one end section serving as a first connecting section (61; 161) to be connected to a fuel supply port of one injector of the adjacent injectors; another end section serving as a second connecting section (62; 162) to be connected to a fuel discharge port of the other injector of the adjacent injectors, wherein the fuel supply port and the fuel discharge port of each of the plurality of injectors are arranged opposite to each other, and wherein the fuel supply ports of the plurality of injectors are directed to the same side, and the first connecting section (61; 161) is connected to the fuel supply port of one injector of the adjacent injectors and the second connecting section is connected to the fuel discharge port of the other injector of the adjacent injectors so that the fuel high-pressure pipe (11,111) is connected between the one injector of the adjacent injectors and the other injector of the adjacent injectors, characterized in that the first connecting section (61; 161) and the second connecting section (62; 162) are formed straight and parallel to each other, and the first connecting section (61; 161) and the second connecting section (62; 162) are formed to have respective connection sides (61a, 62a; 161a, 162a) to be connected to the respective injectors so that the respective connection sides (61a, 62a; 161a, 162a) of the first and second connection sections (61, 62; 161, 162) are directed opposite to each other; and an S-shaped bending section (63; 163) formed between the first connecting section (61; 161) and the second connecting section (62; 162).