A circuit board for a non-combustion flavor inhaler includes a substrate and an electrically conductive ink pattern printed on the substrate. The substrate includes paper. A percentage weight loss of the paper from room temperature to 290° C. is less than 20% of a percentage weight loss of the paper from room temperature to 900° C. under a condition that allows air to flow at a flow rate of 100 mL/min while elevating a temperature of the air at a speed of 10° C./min.