Transport device and transport method

The present invention realizes a transport device and a transport method through a simple structure, the device and method making it possible to transfer products such as containers from an upstream conveyor to a downstream conveyor so as to be adequately dispersed in the width direction while avoiding overturning of the products and action of excessive force on the products. A transport device comprising a first conveyor, and a supply unit that supplies products lined up in a plurality of rows to the first conveyor while the products are moved in a third direction that is inclined relative to a first direction and a second direction. The supply unit includes an alignment guide that guides the products lined up in the plurality of rows in the third direction. The alignment guide is formed linearly or substantially linearly spanning at least two ends in a plan view, and the plurality of rows of products are guided by the same alignment guide.