Let n and k be positive integers. The Kneser graph K2n+k
n
is the graph with vertex
set [2n+k]
n and where two n-subsets A, B ∈ [2n+k]
n are joined by an edge if A∩B = ∅.
In this note we show that the diameter of the Kneser graph K2n+k
n
is equal to d
n−1
k
e+1.