According to a feature of the present invention, the body part 111 provided with the upwardly opened space part 112 and the horizontally arranged plate shape provides a space for the subject to lie down, and the upper part of the body part 111 A bed body 110 including a mat part 113 in which a plurality of discharge holes 114 opened up and down are disposed to cover the space part 112 opened while being seated; An available water supply unit 120 for supplying available water (W); A light source unit 131 that is horizontally disposed in the space unit 112 to emit infrared light, and the light source unit 131 extending along the circumference of the light source unit 131 in the space unit 112 is connected to the usable water supply unit 120 Humidification generation including a channel 132 through which the usable water (W) is injected into the interior and an exhaust hole 133 is opened on the side facing the light source unit 131 to discharge the humidified air evaporated from the inside by the light source unit 131 Unit 130; And a herbal pad 141 which is horizontally disposed between the humidification generating part 130 and the mat part 113 in the space part 112 and heated by the light source part 131 and containing herbs inside the cover made of a porous material. There is provided a functional bed apparatus provided with an infrared fumigation function including; a herbal medicine supply unit 140 for containing herbal ingredients in the humidified air discharged through the discharge hole 114 is provided.본 발명의 특징에 따르면, 상향 개구된 공간부(112)가 마련된 바디부(111) 및, 수평배치된 판형상으로 이루어져 피치료자가 누울 수 있는 공간을 제공하고 상기 바디부(111)의 상부에 안착되면서 개구된 공간부(112)를 커버하며 상하로 개구된 복수 개의 배출공(114)이 이격배치된 매트부(113)를 포함하는 베드본체(110); 가용수(W)를 공급하는 가용수공급부(120); 상기 공간부(112) 내에 수평배치되어 적외선광을 발산하는 광원부(131) 및, 상기 공간부(112) 내에서 광원부(131)의 둘레를 따라 연장배치되고 상기 가용수공급부(120)와 연결되어 가용수(W)가 내부로 주입되며 광원부(131)를 향하는 측면에는 배기공(133)이 개구되어 광원부(131)에 의해 내부에서 증발된 가습공기가 토출되는 수로(132)를 포함하는 가습생성부(130); 및 상기 공간부(112) 내에서 가습생성부(130)와 매트부(113)