Patent ID: 8016397

Claim:
A liquid supply device comprising: a liquid supply path used to supply liquid from an upstream side, which is a liquid supply source side, toward a downstream side at which the liquid is consumed; a defoaming chamber that is provided in the middle of the liquid supply path and holds a bubble contained in the liquid in order to make the bubble escape from the liquid; and a decompression chamber that is provided at a position adjacent to the defoaming chamber with a partition wall interposed therebetween and has a lower pressure than the defoaming chamber, wherein the partition wall is configured to allow gas to permeate therethrough and to regulate permeation of liquid and is formed by a separate member from a decompression chamber forming member that forms the decompression chamber, and a part of an inner surface of the liquid supply path is formed by the partition wall, and the liquid supply path passes along the inside of a wall portion of the decompression chamber in the decompression chamber forming member.