A paper sheet handling device, comprising: a paper sheet detection device arranged on a transport path (31, 32) for transporting a paper sheet and configured to detect the paper sheet, wherein the paper sheet handling device further comprising: a handling unit (21, 22, 23, 33, 34) configured to perform handling related to the paper sheet based on the time when the paper sheet detection device detects an end of the paper sheet, wherein the paper sheet detection device includes a mechanical detection sensor including at least a pair of rolling bodies (511, 512) which face each other and between which the paper sheet passes, and a detection unit detecting a displacement of the rolling body when the paper sheet passes between the pair of rolling bodies (511, 512) facing each other in order to detect the end of the paper sheet, characterised in that the paper sheet detection device further includes an optical detection sensor that detects the paper sheet based on light irradiated toward the paper sheet, and each of the mechanical detection sensor and the optical detection sensor is disposed on the transport path (31, 32) and detects the paper sheet, wherein the mechanical detection sensor is arranged upstream of the optical detection sensor in the transport direction (31, 32), and the paper sheet detection device corrects a detection result of the optical detection sensor based on a detection result of the mechanical detection sensor. a paper sheet detection device arranged on a transport path (31, 32) for transporting a paper sheet and configured to detect the paper sheet, wherein the paper sheet handling device further comprising: a handling unit (21, 22, 23, 33, 34) configured to perform handling related to the paper sheet based on the time when the paper sheet detection device detects an end of the paper sheet, wherein the paper sheet detection device includes a mechanical detection sensor including at least a pair of rolling bodies (511, 512) which face each other and between which the paper sheet passes, and a detection unit detecting a displacement of the rolling body when the paper sheet passes between the pair of rolling bodies (511, 512) facing each other in order to detect the end of the paper sheet, characterised in that the paper sheet detection device further includes an optical detection sensor that detects the paper sheet based on light irradiated toward the paper sheet, and each of the mechanical detection sensor and the optical detection sensor is disposed on the transport path (31, 32) and detects the paper sheet, wherein the mechanical detection sensor is arranged upstream of the optical detection sensor in the transport direction (31, 32), and the paper sheet detection device corrects a detection result of the optical detection sensor based on a detection result of the mechanical detection sensor. a handling unit (21, 22, 23, 33, 34) configured to perform handling related to the paper sheet based on the time when the paper sheet detection device detects an end of the paper sheet, wherein the paper sheet detection device includes a mechanical detection sensor including at least a pair of rolling bodies (511, 512) which face each other and between which the paper sheet passes, and a detection unit detecting a displacement of the rolling body when the paper sheet passes between the pair of rolling bodies (511, 512) facing each other in order to detect the end of the paper sheet, characterised in that the paper sheet detection device further includes an optical detection sensor that detects the paper sheet based on light irradiated toward the paper sheet, and each of the mechanical detection sensor and the optical detection sensor is disposed on the transport path (31, 32) and detects the paper sheet, wherein the mechanical detection sensor is arranged upstream of the optical detection sensor in the transport direction (31, 32), and the paper sheet detection device corrects a detection result of the optical detection sensor based on a detection result of the mechanical detection sensor. at least a pair of rolling bodies (511, 512) which face each other and between which the paper sheet passes, and a detection unit detecting a displacement of the rolling body when the paper sheet passes between the pair of rolling bodies (511, 512) facing each other in order to detect the end of the paper sheet, characterised in that the paper sheet detection device further includes an optical detection sensor that detects the paper sheet based on light irradiated toward the paper sheet, and each of the mechanical detection sensor and the optical detection sensor is disposed on the transport path (31, 32) and detects the paper sheet, wherein the mechanical detection sensor is arranged upstream of the optical detection sensor in the transport direction (31, 32), and the paper sheet detection device corrects a detection result of the optical detection sensor based on a detection result of the mechanical detection sensor.