Heater, and fluid heating device

Abstract

A heater according to the embodiment is a heater that contacts with a relatively flowing fluid and heats the contacted fluid. The heater includes: a base portion presenting a plate-like shape, having a first surface which is a convex curved surface and a second surface which faces the first surface and is a concave curved surface, and the base portion being three-dimensionally bent; and at least one heating portion provided on at least one of the first surface side of the base portion and the second surface side of the base portion.

Dependencies are inferred from the claim text.