A wall of a hot gas component, comprising - a hot-gas sided surface, - a cold-gas sided surface located opposite the hot-gas sided surface, - at least one film cooling hole extending from an inlet in the cold-gas sided surface to an outlet in the hot-gas sided surface for leading a cooling fluid from the cold-gas sided surface to the hot-gas sided surface, the respective film cooling hole comprising a metering section of constant cross-section extending downstream from the inlet, and a diffuser section extending from the metering section to the outlet, the diffuser section at least being bordered by a diffuser bottom and two opposing diffuser side walls, the diffuser section comprising a leading region that extends from the metering section to the outlet in the hot-gas sided surface, wherein the leading region of the diffuser section lies opposite the diffuser bottom and corresponds to an elongation of a leading region of the metering section up to the outlet, the leading region of the diffuser section has the form of a cylinder segment, the diffuser section comprising two curved cross-sectional shaped diffuser arms (15, 16) for dividing a fluid flow into two subflows as well as means for generating delta-vortices: the diffuser bottom being arched such that a at least substantially linear and/or blunt central edge that extends from the metering section or from a point on the diffuser bottom near the metering section to the outlet in the hot-gas sided surface are obtained and, the diffuser bottom being arched such that the two diffuser arms (15, 16) on both sides of the central edge that branch off from the metering section in a V-shaped manner are obtained, and the outlet in the hot-gas sided surface being substantially V-shaped, in particular substantially boomerang-shaped, the outlet in the hot-gas sided surface having a trailing edge that is at least substantially V-shaped, such that the two diffuser arms (15, 16) include an angle (β) in the range of 50 to 80°, in a plane that is orthogonal to the central longitudinal axis of the metering section, and/or that the at least substantially V-shaped trailing edge defines an angle (α) in the range of 100° to 60°; and the diffuser section comprising two curved, in particular convex side walls, wherein in particular each curved side wall of the diffuser section is a side wall of one of the diffuser arms (15, 16), and wherein the radius of curvature of the respective side wall varies in longitudinal direction of the respective arm (15, 16). - a hot-gas sided surface, - a cold-gas sided surface located opposite the hot-gas sided surface, - at least one film cooling hole extending from an inlet in the cold-gas sided surface to an outlet in the hot-gas sided surface for leading a cooling fluid from the cold-gas sided surface to the hot-gas sided surface, the diffuser bottom being arched such that a at least substantially linear and/or blunt central edge that extends from the metering section or from a point on the diffuser bottom near the metering section to the outlet in the hot-gas sided surface are obtained and, the diffuser bottom being arched such that the two diffuser arms (15, 16) on both sides of the central edge that branch off from the metering section in a V-shaped manner are obtained, and the outlet in the hot-gas sided surface being substantially V-shaped, in particular substantially boomerang-shaped, the outlet in the hot-gas sided surface having a trailing edge that is at least substantially V-shaped, such that the two diffuser arms (15, 16) include an angle (β) in the range of 50 to 80°, in a plane that is orthogonal to the central longitudinal axis of the metering section, and/or that the at least substantially V-shaped trailing edge defines an angle (α) in the range of 100° to 60°; and the diffuser section comprising two curved, in particular convex side walls, wherein in particular each curved side wall of the diffuser section is a side wall of one of the diffuser arms (15, 16), and wherein the radius of curvature of the respective side wall varies in longitudinal direction of the respective arm (15, 16).