To reduce the number of part items to improve the assembling property of a multiple stage pump in a guide blade provided within the multiple stage pump by forming a ring-like stepped collar part in a protruding state on the circumferential side of a guide member forming a return passage extending from the circumference of an impeller to the suction port of the adjacent impeller.

In a multiple stage pump in which an intermediate casing formed by press molding a steel plate is used, and pump components such as a suction frame, the intermediate casing, a valve casing and the like are clamped and fixed by use of a through-bolt inserted to the circumference of the pump, a guide blade 1 mounted therein comprises a plurality of, for example, 5 guide members 2 for forming a return passage, which are formed at fixed intervals in the circumferential direction of a disc having a circular hole O. A ring-like stepped collar 3 is integrally formed on the circumferential side of the guide members 2 to form a lower stepped part 3a and an upper stepped part 3b. At this time, the lower stepped part 3a is formed so as to closely fit into the intermediate casing, so that the assembling can be performed with a small number of part items.