To provide an indoor chemical material measuring apparatus having a small facility, supporting a JIS small chamber method, measuring instantaneous value in the field, easily identifying a generation source, accurately measuring by a sampler, and quickly measuring by implementing an accelerated test.

The indoor chemical material measuring apparatus is provided with a casing 10 having an opening 11 in a lower part, a heater unit 13 disposed in an upper part of the casing, probe attaching and inserting holes 22 of an measuring instrument 20 disposed on walls of the casing 10, an air intake 24 for admitting indoor air into the casing through a filter 25 and an exhaust pump 27 connected to the casing 10 through a sampler attaching part 30.