Milling cutter and an indexable milling insert

A milling cutter for chip removing machining, the milling cutter comprising a milling cutter body with at least one insert pocket associated with an end of the milling cutter body, wherein an opposite end of the milling cutter body is shaped to cooperate with a tool attachment, an indexable cutting insert being secured in each cutting insert pocket, wherein each indexable cutting insert has two substantially identical main surfaces, wherein two side surfaces and two end surfaces extend between the main surfaces, each main surface comprising two cutting insert corners, each cutting insert corner comprising a main cutting edge and a minor cutting edge, wherein a part of each main surface comprises rake faces, wherein a part of each side surface and each end surface comprises clearance surfaces, the cutting insert having a height between the end surfaces, each main surface comprising an associated support surface, wherein a perpendicular distance from each main cutting edge on either one of the two main surfaces to a plane that coincides with the support surface on the other one of the two main surfaces increases in direction from the cutting corner defined by the main cutting edge to a crest proximate a half height of the indexable cutting insert.