摘要: Fractional dynamics of relativistic particle is discussed. Derivatives fractional orders with respect to proper time describe long-term memory effects that correspond intrinsic dissipative processes. Relativistic subjected a non-potential four-force considered as nonholonomic system. The constraint in four-dimensional space-time represents the invariance by equation for four-velocity u_{\mu} u^{\mu}+c^2=0, where c speed light vacuum. In general case, described non-Hamiltonian and dissipative. Conditions be Hamiltonian system are considered.