1. An apparatus for encoding/decoding a video, the apparatus comprising: a video encoder for calculating a predicted motion vector of a current block to be encoded by using motion vectors of one or more surrounding blocks, and encoding a result of performing a prediction of the current block and information indicating that the current block is a skip block when the predicted motion vector satisfies a skip condition; and a video decoder for decoding information indicating that a current block to be decoded is a skip block, calculating a predicted motion vector of the current block to be decoded by using motion vectors of one or more surrounding blocks, selecting the calculated predicted motion vector as a motion vector of the current block to be decoded, and decoding the current block in a skip mode by using the motion vector of the current block, wherein at least one motion vector among the motion vectors of the surrounding blocks and the motion vector of the current block has a resolution different from resolutions of the other motion vectors.