A kind of composition of buoy, it includes: at least one mark body, at least one mark tail, at least one mark foot. For each mark as a floating body, axle center is provided with a central siphon. The lower end of each mark tail can be inserted into the central siphon by the top of each mark body, and enable the mark tail and the mark body affixed in being fitted close between the mark tail lower end and the central siphon. The upper end of each mark foot can be inserted into the central siphon by the lower section of each mark body, and enable the mark tail and the mark body affixed in being fitted close between the mark foot upper end and the central siphon. By selecting the combination of any mark body, any mark tail, any mark foot, that is, it may make up a buoy.一種浮標之構成，其包含：至少一個標身、至少一個標尾、至少一個標腳。每一標身為一浮體，其軸心設置有一軸管。每一標尾的下端能夠由每一標身的上方插入該軸管內，且該標尾下端與該軸管間呈緊密配合，令該標尾與該標身固接。每一標腳的上端能夠由每一標身的下方插入該軸管內，且該標腳上端與該軸管間呈緊密配合，令該標尾與該標身固接。藉由選擇任一標身、任一標尾、任一標腳的組合，即可構成一浮標。
