We present an attempt to formulate the supersymmetric and relativistic
quantum mechanics in the sense of realizing supersymmetry on the single
particle level, by utilizing the equations of motion which is equivalent to the
ordinary 2nd quantization of the chiral multiplet. The matrix formulation is
used to express the operators such as supersymmtry generators and fields of the
chiral multiplets. We realize supersymmetry prior to filling the Dirac sea