A moving picture decoding device 30 includes: a transform unit 34a sets a decoded luminance component of a prediction target block to the same number of samples as that of the chrominance component corresponding to the decoded luminance component of the prediction target block, and generates a luminance reference signal; a specification unit 34b specifies pixels of luminance having the minimum and maximum pixel values of the decoded luminance component adjacent to the decoded luminance component of the prediction target block, respectively, outputs luminance pixel values obtained from the specified pixels of luminance, and outputs chrominance pixel values obtained from pixels of pigment corresponding to the pixels of luminance; a derivation unit 34c derives a linear prediction parameter from the luminance pixel value, the chrominance pixel value, and a linear prediction model; a chrominance linear prediction unit 34d obtains a chrominance prediction signal by applying the linear prediction model based on the linear prediction parameter to the luminance reference signal; and an addition unit 34e adds the chrominance prediction signal and the chrominance residual signal to generate a reconstructed chrominance signal.