Problem to be Solved: The present invention is intended to provide a polynucleotide encoding the light-chain variable region and the heavy-chain variable region of an anti-dog IgE antibody and an anti-dog IgE antibody containing these variable regions. Solution: The present invention is DNA encoding a heavy-chain variable region consisting of the amino acid sequence represented by SEQ ID NO: 2 or 6 and DNA encoding a light-chain variable region consisting of the amino acid sequence represented by SEQ ID NO: 4 or 8, and an anti-dog IgE monoclonal antibody which binds to dog IgE, containing these variable regions or a functional fragment thereof which binds to dog IgE.