Abstract: The invention relates to an ear catheter for insertion into the eustachian tube with a first tube as catheter tube (3) provided with at least one first lumen as injection duct (3A) for the application of a liquid/fluid, at least one second lumen as pressure relief lumen (3B) for pressure relief and a self-expandable sealing element (2) for the occlusion of the eustachian tube, as well as an insertion aid comprising a headpiece, a middle piece and an end piece, wherein the insertion aid consists of a biocompatible polymer, and with at least one separator line extending at least through each of the middle piece and the end piece, along which the insertion aid can be unfolded or split open. The insertion aid proposed by the invention can thus be removed from a catheter even if the catheter ends are blocked.