Rhizopogon parvisporus is a small, truffle-like fungus in the family Rhizopogonaceae.

Found in Canada, it was described as new to science in 1962 by Constance Bowerman, from collections made in Newfoundland.

The roughly spherical to irregularly shaped fruitbodies of the fungus measure 10–21 mm (0.4–0.8 in) in diameter when fresh, although they tend to shrink when dry.

The spores have the shape of narrow ellipsoids, and rarely exceed 5 μm in length.

In the former location, it was found along a riverbank in spruce woods, while in the latter it grew on mossy slopes in thickets of alder and fir.