To provide a method for efficiently producing a rhenium complex having various heterocyclic ligands and useful as various functional materials in a short time.

The method for producing the rhenium complex having a plurality of nitrogen-containing heterocyclic ligands and useful as various functional materials comprises reacting a rhenium compound with a nitrogen-containing heterocyclic ligand compound. In the production method, the reaction is carried out under irradiation of microwave and preferably in the presence of a polar solvent.