<p>The present invention relates to a fluid storage tank including: a storage part to store fluids; a fluid supply part to provide a path for supplying a fluid to the storage part; a filter part to filter foreign substances included in a gas flowing into the storage part; and a connection line of which one side is joined to the fluid supply part and the other side is joined to the filter part. The filter part filters foreign substances included in a gas flowing into the storage part through the fluid supply part and the connection line. According to the present invention, the fluid storage tank reduces a path through which moisture and fine particles may flow in to reduce the inflow of foreign substances, thereby reducing the contamination of fluids caused by foreign substances.</p>
