The invention relates to medicine, and pulmonology, surgery, anesthesiology, and can be used as device for carrying out anesthesia, and also for investigating effect of gaseous substances on organism.Technical problem of, on which is directed this this utility model, creation of automatic inhaler for small animals, which allows not only to inhalation, bypassing contact technician with animals during manipulations above them, but and automatically possible to control level supply and degree of yield of substance, oxygen, and may also have the possibility of adjusting size of hole under individual morphometric characteristics of neck of animals without excessive capacity hydraulic.Substance utility model consists in the fact, that in automatic inhalation chamber for laboratory animals, including three container from transparent plastic, and hermetically connected in series, the first of which contains acting substance and is connected by means of pipe with the second container through exhaust fan in its upper part, at the same time opening in side part of the second container by means of tube is connected through exhaust fan with the third container, having on the opposite fan lateral side of pipe for output of carbon dioxide and oxygen, on front surface of the second container in its lower part is located hole for neck of animal and before it - operational table, in pipe, connecting the first and second containers, are installed fan and opening valve, on the front wall of the second container - nozzle with balloon for air for the possibility of size control holes for neck, and on back side - fan for oxygen supply, the inhaler has two toggle with the possibility of installation time, one of which is located on the second container and has the possibility of simultaneous switching on/off of the fan in pipe and of exhaust fan of the second container, the second toggle switch is mounted on third container and has the possibility of simultaneous switching on/off fan for oxygen supply and exhaust fan of the third container, all fans with potentiometers of, and in the third container carbon dioxide and oxygen are cleared by means of sorbent.Power fans is adjusted by means of potentiometers, that allows to regulate feed rate inhalation substance (from 0.25 to 0.125 ml/with). Switching fans a certain period of time provided by toggle with time relay.