Heater for melting glass

A heater for melting glass, comprising:

• a heating member containing carbon (C) configured to emit heat rays upon power feeding;
• and
• a tubular member made of metal configured to have one end closed, and to house the heating member,
• wherein the heating member includes a first heat generating part and a second heat generating part along an extending axis direction of the heater, and the first heat generating part is arranged at a position closer to the one end of the tubular member than is the second heat generating part, and
• wherein the first heat generating part has a unit-length resistance along the extending axis direction defined by X (Ω/m), the second heat generating part has a unit-length resistance along the extending direction defined by Y (Ω/m), and the unit-length resistances X and Y of the heating member satisfy Formula (1):
• ( 1/30)X<Y<(½)X.