The vehicle mounted soil sampler includes a vertical mast tube connected to a receiver hitch mounted on a vehicle. A support plate is clamped to the mast. A drive shaft and gear, driven by a motor, is journaled in a gear housing mounted on the support plate. An elongated gear rack is parallel to the vertical mast and moved vertically by the drive shaft and gear in the gear housing. A tubular soil probe with an open bottom end and an open slot is attached to the gear rack. A spoon bar is pivotally attached to the mast tube. A spoon bar lower end is urged into the open slot and removes soil from the tubular soil probe during upward movement of the gear rack. A soil sample container catches soil discharged from the soil probe. A plastic guide bearing guides the gear rack.