To provide a toothbrush handle high in transparency and superior in design which is provided with appropriate elasticity and mechanical strength, is barely chemically changed by perfume in toothpaste so as to be superior in chemical resistance, and is resistant to heat so as to resist sterilization by boiling.

The toothbrush handle comprises a head part 1 in which a brush or a brush bundle is planted, a neck part 2 continuous to the head part 1, and a handle part 3. Polyethylene naphthalate is used as the material of the toothbrush handle.