A paper sheet processing device comprising: a housing; a storage unit disposed in the housing for storing sheets therein, a control board disposed in the housing for controlling an operation of the paper sheet processing device; and at least one conductive wire having a first wire end (34a, 35a) connected to the control board and a second wire end (34b, 35b), wherein the housing includes a bottom having a first bottom end and a second bottom end in a first direction, a first side wall and a second side wall connected to the first bottom end and the second bottom end respectively and disposed facing each other in a horizontal direction and in the first direction, an opening portion provided on a front surface side of the housing, and a door portion disposed on the front surface side of the housing for closing or opening the opening portion, wherein at least one of the first side wall and the second side wall is provided with at least one hole which penetrates therethrough from inside of the housing to outside of the housing and through which the second wire end (34b, 35b) of the conductive wire extends from inside of the housing to outside of the housing, and the storage unit is configured to be drawable forward in a second direction orthogonal to the first direction from inside of the housing to outside of the housing through the opening portion when the door portion is opened, wherein the bottom has an inner bottom facing inside of the housing and having a groove portion which extends between the first side wall and the second side wall and is disposed between the door portion and the storage unit being at a storage position where the storage unit is stored in the housing, and the conductive wire is disposed so as to be stored at the groove portion. a housing; a storage unit disposed in the housing for storing sheets therein, a control board disposed in the housing for controlling an operation of the paper sheet processing device; and at least one conductive wire having a first wire end (34a, 35a) connected to the control board and a second wire end (34b, 35b), wherein the housing includes a bottom having a first bottom end and a second bottom end in a first direction, a first side wall and a second side wall connected to the first bottom end and the second bottom end respectively and disposed facing each other in a horizontal direction and in the first direction, an opening portion provided on a front surface side of the housing, and a door portion disposed on the front surface side of the housing for closing or opening the opening portion, wherein at least one of the first side wall and the second side wall is provided with at least one hole which penetrates therethrough from inside of the housing to outside of the housing and through which the second wire end (34b, 35b) of the conductive wire extends from inside of the housing to outside of the housing, and a bottom having a first bottom end and a second bottom end in a first direction, a first side wall and a second side wall connected to the first bottom end and the second bottom end respectively and disposed facing each other in a horizontal direction and in the first direction, an opening portion provided on a front surface side of the housing, and a door portion disposed on the front surface side of the housing for closing or opening the opening portion, wherein at least one of the first side wall and the second side wall is provided with at least one hole which penetrates therethrough from inside of the housing to outside of the housing and through which the second wire end (34b, 35b) of the conductive wire extends from inside of the housing to outside of the housing, and the storage unit is configured to be drawable forward in a second direction orthogonal to the first direction from inside of the housing to outside of the housing through the opening portion when the door portion is opened, wherein the bottom has an inner bottom facing inside of the housing and having a groove portion which extends between the first side wall and the second side wall and is disposed between the door portion and the storage unit being at a storage position where the storage unit is stored in the housing, and the conductive wire is disposed so as to be stored at the groove portion.