To provide an air tank arrangement simplified and realizing space-saving in installation by utilizing dead space of a bracket for mounting attachments.

A bracket (4) for holding an attachment (3) of a loom is set on a loom frame (2) and comprises a base part (6) and a receiving part (7), wherein the base part (6) has a fixing surface (5) for mounting the bracket (4) on the loom frame (2) and the receiving part (7) receives the attachment (3) of the loom and is extended from the base part (6). A space (8) of an hollow open box shape is formed in the base part (6). The air tank (10) for storing compressed air is formed by making the space (8) airtight.