The present disclosure relates to a functional chair for human body correction and therapeutic efficacy promotion by applying heat, including: a main body which includes a sitting plate and a waist plate; a heating means to transfer the heat to a human body by using a ceramic heating element installed in the sitting plate and the waist plate; and a control unit which maintains the temperature of the heating means at a pre-established value and displays an operating status. The present disclosure provides immunity increase and health promotion by keeping a skeletal structure and organs balanced by allowing a user to keep a correct posture when they are sitting on the functional chair and by applying heat to a structure including the sitting and waist plates as a Korean traditional floor heating system, which has no influence of electromagnetic waves, does, provides convenience of portability and performs therapeutic effects for various body parts including the vertebral column, calves, feet, etc.