Heater device and heating method using same for body to be heated

A heater device (10), which is to be attached to a body (30) to be heated, said body requiring to be heated and having an uneven shape, and which heats the body, is characterized by including: a conductive member (120), which is heat-conductive, and is configured to be attached to a recessed section (350) of the body (30); and a heater (110) configured to cover and heat the body (30) and the conductive member (120) in a state wherein the conductive member (120) is attached to the recessed section (350) of the body (30). The heater device (10) is also characterized by being configured such that, in the state wherein the conductive member (120) is attached to the recessed section (350) of the body (30), and the body (30) and the conductive member (120) are covered with the heater (110), a part of the heater (110) is in contact with a protruding section (360) of the body (30). 种加热器装置(10)，是安装在需要加热且具有凹凸形状的被加热体(30)上而进行加热的加热器装置(10)，包括：热传导性的传导部件(120)，安装到被加热体(30)的凹部(350)；加热器(110)，在将传导部件(120)安装在被加热体(30)的凹部(350)的状态下，将该被