The present disclosure provides a nozzle structure for a hydrogen gas burner apparatus, capable of reducing an amount of generated NOx. A nozzle structure for a hydrogen gas burner apparatus, includes an outer pipe, an inner pipe disposed concentrically with the outer pipe, and a stabilizer configured to throttle a space between the outer pipe and the inner pipe. The inner pipe includes an inner pipe end part with an axial opening hole and a circumferential opening hole formed therein, the axial opening hole penetrating in an axial direction of the inner pipe, the circumferential opening hole penetrating in a radial direction of the inner pipe. A hydrogen gas flows through the inner pipe. The circumferential opening hole lets the hydrogen gas flow out from the inner pipe in the radial direction of the inner pipe.