A planetary gear device (1) is provided with: a sun gear (5) having outer teeth; a plurality of planet gears (7) having outer teeth and which meshes with the sun gear; a ring gear (9) having inner teeth and which meshes with the planet gears; and a baffle unit (35) that is positioned between adjoining planet gears, and the sides of which (37F, 37R) are close to the planet gears. The baffle unit (35) is provided with: oil feed holes (47) through which oil lubricant (OL) is sprayed towards meshing parts (43, 45) between the planet gears and the sun gear and which are disposed at the tip (41) facing the outer periphery of the sun gear (5); and a collection port (55) that is disposed on the side surface and which collects the sprayed oil lubricant (OL) in the baffle unit (35).
