A combustion heater (110) is provided with the following: a heating plate (126); a placement plate (120) disposed opposite said heating plate; an outer wall (122) provided around the periphery of the heating plate and the placement plate; a partitioning plate (124) disposed so as to face the heating plate and the placement plate inside the space enclosed by the heating plate, the placement plate, and the outer wall; and a combustion chamber (136) in the space enclosed by the heating plate, the placement plate, and the outer wall. A gap between the partitioning plate and the placement plate forms an introduction region (134), and a gap between the partitioning plate and the heating plate forms a lead-out region (138). A fuel gas introduced into the combustion chamber via the introduction region is burned, and exhaust gases produced by said combustion are led out towards the lead-out region. The partitioning plate is provided with a textured part (146) that has convexities and concavities in the thickness direction thereof.