A cutting tool for chip removing machining of workpieces, wherein the cutting tool is a milling tool, the cutting tool comprising a body and at least one cutting insert adapted to be mounted in an insert seat of the body, the body having a front end, a rear end, and a peripheral side surface extending between the front end and the rear end, the insert seat being provided at the front end and being formed in a transition between the front end and the peripheral side surface, the cutting insert and the insert seat sharing a common central axis (C 1) when the cutting insert is mounted in the insert seat, wherein the cutting insert has a circular basic shape and comprises: - a rake surface, - a bottom surface opposite to the rake surface, - a side surface extending between the rake surface and the bottom surface, - a cutting edge formed in a transition between the side surface and the rake surface, and - at least one anti-rotation stopping indent comprising a first stop surface, wherein the insert seat of the body comprises: - a bottom support surface configured to abut and support the bottom surface of the cutting insert, - a side wall comprising at least one side support surface (113, 114) configured to abut and support the side surface of the cutting insert, - at least one anti-rotation stop protruding with respect to the side wall and comprising a second stop surface, and - a concavely curved first duct separating the second stop surface from the side wall, when seen in a section taken perpendicularly to the common central axis (C 1), an angle (α) of less than 180° is being formed between a tangent to the second stop surface and a tangent to the first duct at a transition between the second stop surface and the first duct, wherein the at least one anti-rotation stop is adapted to inhibit rotation of the cutting insert in the insert seat about the common central axis (C 1) by contact between the first stop surface and the second stop surface, characterized in that the at least one anti-rotation stopping indent is formed in a transition between the bottom surface and the side surface and the second stop surface is completely located within the anti-rotation stopping indent when the cutting insert is mounted in the insert seat. - a rake surface, - a bottom surface opposite to the rake surface, - a side surface extending between the rake surface and the bottom surface, - a cutting edge formed in a transition between the side surface and the rake surface, and - at least one anti-rotation stopping indent comprising a first stop surface, - a bottom support surface configured to abut and support the bottom surface of the cutting insert, - a side wall comprising at least one side support surface (113, 114) configured to abut and support the side surface of the cutting insert, - at least one anti-rotation stop protruding with respect to the side wall and comprising a second stop surface, and - a concavely curved first duct separating the second stop surface from the side wall, when seen in a section taken perpendicularly to the common central axis (C 1), an angle (α) of less than 180° is being formed between a tangent to the second stop surface and a tangent to the first duct at a transition between the second stop surface and the first duct,