To secure both excellent execution and high tensile strength by integrally forming a self-drilling rock bolt and PC steel material fixed on its inside as an anchor body under grout solidification.

A prescribed PC steel material 34 is inserted and innerly provided in a bolt inside 10b from the bolt head of a self-drilling lock bolt 10 to the bolt edge part. The PC steel material 34 and the self-drilling rock bolt 10 are integrally formed as an integral anchor body under solidification of grouts 14, 14 in the bolt inside. Tensile strength of the PC steel material 34 inserted in the bolt inside 10b is reflected as the tensile strength of the anchor body as it is. Thus, both the excellent execution of the self-drilling rock bolt 1 and the high tensile strength of the PC steel material 34 can be secured in the anchor body.