A bicycle sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket includes a plurality of first sprocket teeth, a first sprocket inward surface, a first sprocket outward surface, and an axial space. The second sprocket includes a plurality of second sprocket teeth, a second sprocket inward surface, and a second sprocket outward surface. The axial space is defined between the first sprocket outward surface and an axially inward outer link plate in the axial direction while the second sprocket outward surface contacts an axially outward inner link plate in an engagement state where the one of the plurality of the second sprocket teeth is positioned between an axially inward inner link plate and the axially outward inner link plate in the axial direction. The axial space is larger than mm and equal to or smaller than 0.15 mm.