A new technique for suppressing the Kármán vortex excitation of an elastically supported cylinder placed in an otherwise uniform flow is presented in this paper. By placing an another cylinder downstream of it in a cruciform arrangement with a gap s between them, the oscillation of the upstream cylinder can be virtually eliminated in the range of s/d1 < 0.4, where d1 is the diameter of the upstream cylinder. Compared with conventional techniques, this possesses the following advantages: i) it is unnecessary to change the shape of the oscillating body or remodel its supporting structure, and ii) the flow approaching the upstream body is practically undisturbed
