To provide an indoor air circulation type ventilator for providing an opportunity of cooking on a cooking table and sitting in a happy family circle, that is prevented from falling through being mounted on the under surface of a ceiling, has an easily-maintainable battery and replacement type adsorption filter, has a switch enabling easily operation to turn ON and OFF and causes small noises by solving the problem that even though people want to enjoy grilling and a one pot dish cooked on a cooking table in a house, cooking on a cooking table is apt to be hated soot, steam, and a smell adhere to an indoor interior material and a cloth.

A member for mounting a body is fixed on a ceiling surface and a body is mounted on its bedding plate. The interior of the body consists of a power source, a sound insulation vibration control mat, a motor, a fan, an adsorption filter, and a switch to drive the body. An umbrella-form body is mounted in a manner to be high-efficiently sucked to the adsorption filter.