Method for inducing a merge candidate block

The present invention relates to a method of inducing a fusion candidate block and to a device using the same. An image decoding method involves decoding information in relation to the motion estimation region (MER); determining whether or not a predicted target block and a spatial fusion candidate block are included in the same MER; and determining that the spatial fusion candidate block is an unavailable fusion candidate block when the predicted target block and the spatial fusion candidate block are included in the same MER. Accordingly, by performing the method for inducing a fusion candidate in parallel, parallel processing is enabled and the amount of computation and complexity of implementation are reduced.