Abstract: A turbine rotor blades assembly is provided which can be assembled easily and which can also maintain a securely fixed circumferential relationship between top portions of adjacent turbine rotor blades during operation. The present invention provides a turbine rotor blades assembly having a plurality of turbine rotor blades fixed to the outer circumference of a turbine rotor comprising: the turbine rotor blades fixedly inserted into the turbine rotor and each including a profile member extending radially outwardly from a central axis and a top plate formed integrally with the profile member at the outer end thereof, wherein said top plate provides an abutment interconnection relationship between adjacent turbine rotor blades, wherein said abutment engaging surfaces between adjacent turbine rotor blades are slantingly angled relative to a mean straight line extending from the center of the rotor to the center of the profile member.