1. An image coding device comprising: a depth image coding section that codes a depth image that represents a distance from a viewpoint to an object that is contained in an object plane of a texture image and generates depth information based on the coded depth image; a texture image coding section that codes the texture image by using the depth information in a case where the texture image is to be coded by using the depth information and codes the texture image without using the depth information in a case where the texture image is to be coded without using the depth image; and a use result information coding section that generates use result information that indicates whether or not the depth information is used in coding the texture image and codes generated use result information.