  In the preceeding works, we have given a non-Abelian dual superconductivity
picture for quark confinement, and demonstrated the numerical evidences on the
lattice. In this talk, we discuss the confinement and deconfinement phase
transition at finite temperature in view of the dual superconductivity. We
investigate chromomagnetic monopole currents induced by chromoelectric flux in
both confinement and deconfinement phase by the numerical simulations on a
lattice at finite temperature, and discuss the role of the chromomagnetic
monopole in the confinement/deconfinement phase transition.
