The present invention relates to an electronic cigarette which can be used in substitution for cigarette by evaporating a nicotine concentrate or a tobacco incense concentrate to inhale the evaporated concentrate. The electronic cigarette comprises: a liquid tank (4) having a storage space in which a liquid concentrate is accommodated an evaporation chamber (5) including a combustion room (51) having an electric heating body (2) provide inside, wherein the combustion room receives the liquid concentrate from the liquid tank (4) and heats the liquid concentrate through supplied electric power to evaporate the liquid concentrate, thereby generating steam a main body (7) accommodating a control unit (6) for controlling the supply of the power to the electric heating body (2) by controlling electric power of a battery (B) provided inside and a smoking bar (3) communicating with the combustion room (51) to inhale the generated steam. Here, a switch (61) for controlling the control unit (6) is composed of a push button, and the voltage of the electric power supplied to the electric heating body (2) is controlled depending on the number of operations of the push button applied per unit time. A plurality of LEDs (62) emitting individual light emission colors are disposed in the main body (7), wherein the LEDs (62) individually emit lights depending on the voltage supplied to the electric heating body (2). A light guiding body (63) for guiding lights emitted from the LEDs (62) is provided on a surface of the main body (7), and thus, the voltage applied to the electric heating body can be recognized from the light emission colors through the light guiding body (63).COPYRIGHT KIPO 2015본 발명은, 니코틴 농축액 또는 담배향 농축액을 기화시켜 이를 흡입하도록 함에 따라 담배 대용으로 사용할 수 있도록 액상 농축액이 수용되는 저장공간을 가지는 액상탱크(4)와, 내부에 전열 체(2)가 구비되어 상기 액상탱크(4)에서 액상 농축액을 공급받아 공급되는 전원을 통해 가열하여 기화시켜 증기를 발생하도록 된 연소실(51)을 가지는 기화 챔버(5)와, 내부에 마련된 배터리(B)의 전원을 제어하여 상기 전열 체(2)로의 전원공급을 제어하도록 된 제어수단(6)이 수용된 본체(7)와, 상기 연소실(51)과 연통 되게 결합 되어
