A stereo camera device detecting a distance to a subject, the stereo camera device being configured to be mounted on a moving body and comprising: two cameras (102, 104) that are installed in a manner such that the two cameras (102, 104) are separated from each other by a base line length; and a calculation unit configured to calculate a distance to the subject based on images of the subject acquired by the two cameras; wherein the calculation unit includes an image processing unit, an offset value calculation unit, a statistical processing unit, and a distance calculation unit, wherein the two cameras are configured to acquire first images at a first time point (t 0) and second images at a second time point (t 1); wherein the image processing unit is configured to search for corresponding points of the images acquired by the two cameras and to calculate for each corresponding point between the first images, a first parallax value (p k0) based on differences in positional coordinates of the corresponding point on the first images and for each corresponding point between the second images, a second parallax value (p k1) based on differences in positional coordinates of the corresponding point on the second images, characterized in that the offset value calculation unit is configured to calculate a running distance of the moving body between the first time point (t 0) and the second time point (t 1) based on information output from a velocity sensor that detects a moving velocity of the moving body, and for each corresponding point between the images acquired at the two time points (t 0, t 1), a parallax offset value (q k) based on the first parallax value (p k0) and the second parallax value (p k1) of the corresponding point calculated by the image processing unit at the two time points and the running distance, and wherein the statistical processing unit is configured to perform a statistical analysis on a distribution of the parallax offset values and determine an optimum value of the parallax offset values based on the statistical analysis, the optimum value being used as a correction parameter (q), wherein the distance calculation unit is configured to calculate the distance to the subject by using the correction parameter. two cameras (102, 104) that are installed in a manner such that the two cameras (102, 104) are separated from each other by a base line length; and a calculation unit configured to calculate a distance to the subject based on images of the subject acquired by the two cameras; wherein the calculation unit includes an image processing unit, an offset value calculation unit, a statistical processing unit, and a distance calculation unit, wherein the two cameras are configured to acquire first images at a first time point (t 0) and second images at a second time point (t 1); wherein the image processing unit is configured to search for corresponding points of the images acquired by the two cameras and to calculate for each corresponding point between the first images, a first parallax value (p k0) based on differences in positional coordinates of the corresponding point on the first images and for each corresponding point between the second images, a second parallax value (p k1) based on differences in positional coordinates of the corresponding point on the second images, characterized in that the offset value calculation unit is configured to calculate a running distance of the moving body between the first time point (t 0) and the second time point (t 1) based on information output from a velocity sensor that detects a moving velocity of the moving body, and for each corresponding point between the images acquired at the two time points (t 0, t 1), a parallax offset value (q k) based on the first parallax value (p k0) and the second parallax value (p k1) of the corresponding point calculated by the image processing unit at the two time points and the running distance, and wherein the statistical processing unit is configured to perform a statistical analysis on a distribution of the parallax offset values and determine an optimum value of the parallax offset values based on the statistical analysis, the optimum value being used as a correction parameter (q), wherein the distance calculation unit is configured to calculate the distance to the subject by using the correction parameter.