In an installation for the transport of tennis balls (17) from a collector gutter to a collector container by passing through a pipe, there is provided a blower installed close to the gutter inlet end to produce a compressed air difference in the gutter; the mechanical transport installation comprises a bucket wheel (14) acting in the cross section of the gutter, and the bucket wheel (14) together with a shaft (27) parallel to the gutter (15) is arranged in a casing (23), at least two buckets preventing each time the air flow produced by the blower to come out of the casing (23).