A method for detecting an excess cigarette feeding error using a cigarette inspection apparatus comprising the steps of: taking an inspection image of a filter end face of a bundle of filter cigarettes coaxially and horizontally arranged, from an axial direction of the cigarettes with a camera, and analyzing the inspection image, further comprising: a first judging step carried out by a first judging means comprising: detecting the number of the filter cigarettes horizontally arranged on the basis of information about the shape of each of the filter end faces, which is obtained from the inspection image, and making a judgment as to whether or not a detected number is equal to a predetermined number; characterized in that the method further comprises a second judging step carried out by a second judging means comprising: finding a centroid position of each of the filter end faces from the inspection image, comparing distance between centroid points of every two adjacent filter end faces, and making a judgment as to whether or not the filter cigarettes horizontally arranged are arranged at predetermined intervals. taking an inspection image of a filter end face of a bundle of filter cigarettes coaxially and horizontally arranged, from an axial direction of the cigarettes with a camera, and analyzing the inspection image, further comprising: a first judging step carried out by a first judging means comprising: detecting the number of the filter cigarettes horizontally arranged on the basis of information about the shape of each of the filter end faces, which is obtained from the inspection image, and making a judgment as to whether or not a detected number is equal to a predetermined number; characterized in that the method further comprises a second judging step carried out by a second judging means comprising: finding a centroid position of each of the filter end faces from the inspection image, comparing distance between centroid points of every two adjacent filter end faces, and making a judgment as to whether or not the filter cigarettes horizontally arranged are arranged at predetermined intervals. a first judging step carried out by a first judging means comprising: detecting the number of the filter cigarettes horizontally arranged on the basis of information about the shape of each of the filter end faces, which is obtained from the inspection image, and making a judgment as to whether or not a detected number is equal to a predetermined number; characterized in that the method further comprises detecting the number of the filter cigarettes horizontally arranged on the basis of information about the shape of each of the filter end faces, which is obtained from the inspection image, and making a judgment as to whether or not a detected number is equal to a predetermined number; characterized in that the method further comprises a second judging step carried out by a second judging means comprising: finding a centroid position of each of the filter end faces from the inspection image, comparing distance between centroid points of every two adjacent filter end faces, and making a judgment as to whether or not the filter cigarettes horizontally arranged are arranged at predetermined intervals. finding a centroid position of each of the filter end faces from the inspection image, comparing distance between centroid points of every two adjacent filter end faces, and making a judgment as to whether or not the filter cigarettes horizontally arranged are arranged at predetermined intervals.