A support sleeve and an arrangement for supporting spaced-apart components or component portions, wherein the support sleeve is of one-part form and comprises a shaft having a first shaft portion, a second shaft portion adjoining the first shaft portion in an axial direction, and a third shaft portion adjoining the second shaft portion in the axial direction, wherein the first shaft portion and the third shaft portion form opposite ends of the support sleeve, wherein the second shaft portion comprises a retaining means that protrudes radially outward in relation to the first shaft portion and the third shaft portion and can be deformed radially inward counter to a restoring force, and wherein the shaft comprises a slot over the entire axial length of the shaft.