To provide a gear pump capable of more efficiently transporting transported articles.

The gear pump 10 has a drive gear 40, a driven gear 42 meshed with the drive gear 40, a gear pump body 12 rotatably supporting the drive gear 40 and the driven gear 42, confined portions 60 defined at the meshed parts of the drive gear 40 and the driven gear 42 and a shutoff part 38 for shutting off at least a part of relief channels 50, 52, 54, 56 providing communication between the confined portions 60 and the outside. The gear pump body 12 has bearings 28, 30, 32, 34 and the relief channels 50, 52, 54, 56 can be formed of cutouts formed in the bearings.