| 摘要 |
The present invention relates to a fluid heater (23) which is easily miniaturized, can be manufactured with low costs, obtains stable heating performance, and heats a fluid by a heater (232). The fluid heater comprises: a heating block (231) which is provided with an inner flow passage (231R) having an inlet (231a) for introducing the fluid and an outlet (231b) for discharging the fluid, and a heater insertion portion (231H) extending in a predetermined axial direction, wherein the inner flow passage (231R) includes a plurality of main flow passage portions (231R1) which extend in the predetermined axial direction and one or a plurality of connection flow passage portions (231R2) connected to the main flow passage portions (231R1). |
