An apparatus and method for coding and decoding a depth image are provided. The depth image coding apparatus predicts directivity of a current macro block using coded adjacent macro blocks. An intra-prediction mode that intra-codes the current macro block using the predicted directivity is included in intra-candidate coding modes. Priorities of intra-candidate coding modes and inter-candidate coding modes are arranged according to characteristics of a color image and coded. As a result, coding efficiency for a depth image may be increased.