Dynamic fracture is one of the unsolved problems in the field of continuum solid mechanics. Especially, lack of governing mechanism of dynamic crack propagation velocity makes the problem difficult. Most of the existing numerical analysis methods for dynamic crack propagation introduce rate dependent artificial material parameters. A numerical analysis method for dynamic fracture without the use of rate dependent artificial material parameters is proposed in this paper. All the material parameters used in the proposed method can be experimentally determined. The major technical elements in the proposed method are PDS-FEM (Particle Discretization Scheme Finite Element Method) and newly proposed "working hypothesis on the governing mechanism of dynamic crack propagation." These technical elements introduces (i) simple treatment of fracture and corresponding discontinuity in displacement field, (ii) mechanism for re-distribution of residual nodal force, and (iii) governing mechanism for crack velocity without the use of rate dependent parameters by energy balance consideration.