A pet watering device for use in a vehicle that has a basin with sidewalls, a bottom and a porous member mounted over the bottom, forming an upper and a lower chamber. The porous member permits the passage of water from the upper to the lower chamber but preferably does not permit the reverse flow of water there through. Water is pumped from the lower to the upper chamber, the amount being substantially equal to the water passing through the porous member and sufficient to maintain the presence of a thin, constant layer of water over the porous member. The device is securely mounted in the vehicle. When the watering device is jostled by the moving vehicle water does not pass from the lower to the upper chamber through the porous member and only a small amount, if any, of water slops out over the upper rim of the basin.
