A pneumatic conveying system for conveying articles to be conveyed, which are successively discharged from an assembling machine, to a plurality of conveying positions. In this pneumatic conveying system, pneumatic conveying and conveyor conveying are combinedly used, whereby conveying for a relatively long distance is effected by pneumatic conveying low in cost per unit conveying distance, and conveying for distributing the articles to be conveyed to the plurality of conveying positions is effected by conveyor conveying easy in distributing. Furthermore, transfer from the pneumatic conveying of the articles to be conveyed to the conveyor conveying is made smooth, and flaw control measure and blocking preventive measure for the articles to be conveyed are applied.

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