  We analyze the Okubo SU(3) relation among the hyperon magnetic moments in the
usual scheme of chiral perturbation theory (ChPT). We classify the one-loop
diagrams, including those with intermediate decuplet baryons, in a simple way
according to whether or not they satisfy the Okubo relation. Contrary to the
conventional wisdom, we find that one-loop contributions to the hyperon
magnetic moments in general violate the Okubo relation if the physical masses
are employed for the meson propagators in the loops.
