The invention relates to a hydraulic chair lift for arrangement in a vehicle, like a car or a van, which hydraulic chair lift comprises: - a rod (3) with attachment means on both ends for attachment with the floor and the roof zone of the vehicle； - a piston (11) arranged around the rod in a middle zone of the rod； - a barrel (4) enveloping the piston, and - two heads (12) arranged on each end of the barrel, which heads are provided with a channel for passage of the rod, wherein a rod gland is arranged in the head surrounding the channel, wherein the channel has relative to the rod gland a first inner channel part with a first diameter and a second inner channel part with second diameter, wherein the first diameter is smaller than the second diameter and wherein the ratio of the length and the diameter of the first channel part is less than 3/5.
