To effectively perform air cleaning in a pachinko parlor utilizing a small space by equipping a frieze board part positioned upside a pachinko game machine with an ultrathin shaped electronic air cleaning system provided with an ionizing line.

In the inside of a frieze board part positioned upside a pachinko game machine in a surrounding body A in which a plurality of pachinko game machines are arranged standing, an extremely thin shaped electronic air cleaner 3 is mounted. The electronic air cleaner 3 is equipped with an ionizing line 3a composed of a fine line which is formed with a conductive metal such as platinum, etc., connected to an electrode and to generate a negative ion and dust collecting paper 3b to attract dust, etc., to the vicinity of the ionizing line 3a. A negative ion is generated between the ionizing line 3a and the dust collecting paper 3b by potential difference higher than or equal to 10,000V and thereby the negative charge is given to dust, etc., in air to cause the dust to be attracted to the dust collecting paper 3b by electrostatic attraction force.