An endoscope includes: an image sensor in which a color filters having two or more colors is disposed at an imaging position and has a predetermined array pattern; and a correction processing unit configured to repeatedly perform processing of changing a target pixel value at a target imaging position to a median value between a neighboring pixel value and the target pixel value, while changing the target imaging position, when a pixel value at a neighboring imaging position near the target imaging position including at least two most neighboring imaging positions on a row closest to the target imaging position with the target imaging position interposed therebetween at an imaging position of a color filter, which is on a row along one direction identical to the target imaging position in image data output from the image sensor, and has a same color as a color filter at the target imaging position, is set as a neighboring pixel value.