  Twistor formulation of massive arbitrary spin particle has been constructed.
Twistor space of such particle is formed two twistors and two complex scalars
which form together 'bosonic supertwistor'. The formulation is deduced from
space-time one for spinning particle by means of introducing auxiliary harmonic
variables and consequent partial fixing of gauges. It is carried out the
canonical quantization of twistor massive particle with nonzero spin. It is
found the eigenvalues of Casimir operators on particle states and harmonic
expansion of wave function in spectrum.
