Water drainage device for a shaft that is open at the top and closed by a base (1) at the bottom, in particular a light shaft that can be attached to a building, with a drainage channel (4) provided on the bottom, characterized by a drainage channel (4) containing the drainage channel (4) into the floor (1) of the Shaft-installable drain pipe (3) which at its upper, inlet-side end has a seat arrangement (11) for a detachably attachable cover (10) provided with a sieve arrangement (14, 15) and which in the area of its inside with a radially inwardly projecting Stop (7) for a drainage line (6) which can be inserted from below and is provided on its outside with a radially outwardly protruding, circumferential creep water barrier (9).
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