A teller cash recycler comprising: a vault unit configured to store bills; a handling unit through which bills are deposited and withdrawn, provided at an upper portion of the vault unit, and slidably movable on the vault unit to a front side and a rear side of the vault unit; a driving gear unit, provided at a lower portion of the handling unit, including a plurality of driving gears for transmitting a driving force provided by a driving unit in the handling unit to a driven gear unit provided at the upper portion of the vault unit, and including plural driven gears which can be engaged with the driving gears so that a driving force from the driving gears is transmitted to the driven gears; a plurality of swing arms, at each of which at least one of the driven gears is installed, the swing arms configured to rotate by sliding movement of the handling unit on the vault unit, each swing arm having a respective swing shaft; and an interference unit, provided at one of the swing arms, configured to apply a rotational moment to said one of the swing arms while being pushed by a part of the handling unit, characterized in that the interference unit is fixed to an end portion of said one of the swing arms via one of the at least one driven gear installed on said one of the swing arms and has an outer diameter greater than an outer diameter of said one driven gear so that when the handling unit slides to the front side or the rear side of the vault unit, the outer diameter of the interference unit is brought into contact with a bottom frame of the handling unit, which makes it possible to avoid the collision between said one driven gear and the handling unit. a vault unit configured to store bills; a handling unit through which bills are deposited and withdrawn, provided at an upper portion of the vault unit, and slidably movable on the vault unit to a front side and a rear side of the vault unit; a driving gear unit, provided at a lower portion of the handling unit, including a plurality of driving gears for transmitting a driving force provided by a driving unit in the handling unit to a driven gear unit provided at the upper portion of the vault unit, and including plural driven gears which can be engaged with the driving gears so that a driving force from the driving gears is transmitted to the driven gears; a plurality of swing arms, at each of which at least one of the driven gears is installed, the swing arms configured to rotate by sliding movement of the handling unit on the vault unit, each swing arm having a respective swing shaft; and an interference unit, provided at one of the swing arms, configured to apply a rotational moment to said one of the swing arms while being pushed by a part of the handling unit, characterized in that the interference unit is fixed to an end portion of said one of the swing arms via one of the at least one driven gear installed on said one of the swing arms and has an outer diameter greater than an outer diameter of said one driven gear so that when the handling unit slides to the front side or the rear side of the vault unit, the outer diameter of the interference unit is brought into contact with a bottom frame of the handling unit, which makes it possible to avoid the collision between said one driven gear and the handling unit.