A condenser tube cleaning apparatus, comprising: a condenser unit having a plurality of unit tubes in an inner region thereof; a foreign substance removal unit located at an inlet side of the condenser unit to remove foreign substances contained in coolant supplied to the condenser unit; a strainer unit configured to sort the coolant passing through the condenser unit into coolant and cleaning balls; and a ball collection unit configured to collect the cleaning balls passing through the strainer unit, wherein the ball collection unit includes: a first valve disposed on a path of a first transfer pipe, a first end of the first transfer pipe being coupled to the strainer unit, and a second end of the first transfer pipe extends to an upper portion of the foreign substance removal unit; a pump unit spaced apart from the first valve and disposed on the first transfer pipe so as to supply the cleaning balls passing through the first valve to the foreign substance removal unit; and a collection unit disposed between the first valve and the pump unit to collect the cleaning balls based on a on switch state of the first valve, characterized in that the first transfer pipe includes a plurality of outlets extending to the upper portion of the foreign substance removal unit and being opened toward the upper portion of the foreign substance removal unit; a separation plate is longitudinally arranged at an inner center of the other end of the first transfer pipe; and the outlets include a first outlet opened at one side with respect to the separation plate and a second outlet opened at an other end with respect to the separation plate. a condenser unit having a plurality of unit tubes in an inner region thereof; a foreign substance removal unit located at an inlet side of the condenser unit to remove foreign substances contained in coolant supplied to the condenser unit; a strainer unit configured to sort the coolant passing through the condenser unit into coolant and cleaning balls; and a ball collection unit configured to collect the cleaning balls passing through the strainer unit, wherein the ball collection unit includes: a first valve disposed on a path of a first transfer pipe, a first end of the first transfer pipe being coupled to the strainer unit, and a second end of the first transfer pipe extends to an upper portion of the foreign substance removal unit; a pump unit spaced apart from the first valve and disposed on the first transfer pipe so as to supply the cleaning balls passing through the first valve to the foreign substance removal unit; and a collection unit disposed between the first valve and the pump unit to collect the cleaning balls based on a on switch state of the first valve, a first valve disposed on a path of a first transfer pipe, a first end of the first transfer pipe being coupled to the strainer unit, and a second end of the first transfer pipe extends to an upper portion of the foreign substance removal unit; a pump unit spaced apart from the first valve and disposed on the first transfer pipe so as to supply the cleaning balls passing through the first valve to the foreign substance removal unit; and a collection unit disposed between the first valve and the pump unit to collect the cleaning balls based on a on switch state of the first valve, a separation plate is longitudinally arranged at an inner center of the other end of the first transfer pipe; and the outlets include a first outlet opened at one side with respect to the separation plate and a second outlet opened at an other end with respect to the separation plate.