A control method of a laundry machine including a drum (30; 32) and a ball balancer mounted to the drum (30, 32) to reduce the unbalance, the control method comprising: a laundry distributing step to rotate the drum at a relatively low speed to uniformly distribute the laundry inside the drum; and a spinning step including a transient region passing step and an accelerating step, wherein the accelerating step includes: a first accelerating step for accelerating the drum (30; 32) to reach a first target RPM for water discharge of laundry and maintaining the first target RPM for a predetermined time; a balancing step for carrying out balancing by decelerating the drum (30;32) such that the drum speed is greater than an RPM passing through a transient region and is less than the first target RPM and compensating for variation in eccentricity due to water discharge of laundry at the first accelerating step; and a second accelerating step for accelerating the drum (30; 32) to reach a second target RPM greater than the first target RPM for water discharge of laundry and maintaining the second target RPM for a predetermined time, wherein the transient region is a predetermined RPM band including at least one resonance frequency which generates resonance according to the system of the laundry machine. a laundry distributing step to rotate the drum at a relatively low speed to uniformly distribute the laundry inside the drum; and a spinning step including a transient region passing step and an accelerating step, wherein the accelerating step includes: a first accelerating step for accelerating the drum (30; 32) to reach a first target RPM for water discharge of laundry and maintaining the first target RPM for a predetermined time; a balancing step for carrying out balancing by decelerating the drum (30;32) such that the drum speed is greater than an RPM passing through a transient region and is less than the first target RPM and compensating for variation in eccentricity due to water discharge of laundry at the first accelerating step; and a second accelerating step for accelerating the drum (30; 32) to reach a second target RPM greater than the first target RPM for water discharge of laundry and maintaining the second target RPM for a predetermined time, wherein the transient region is a predetermined RPM band including at least one resonance frequency which generates resonance according to the system of the laundry machine. a first accelerating step for accelerating the drum (30; 32) to reach a first target RPM for water discharge of laundry and maintaining the first target RPM for a predetermined time; a balancing step for carrying out balancing by decelerating the drum (30;32) such that the drum speed is greater than an RPM passing through a transient region and is less than the first target RPM and compensating for variation in eccentricity due to water discharge of laundry at the first accelerating step; and a second accelerating step for accelerating the drum (30; 32) to reach a second target RPM greater than the first target RPM for water discharge of laundry and maintaining the second target RPM for a predetermined time, wherein the transient region is a predetermined RPM band including at least one resonance frequency which generates resonance according to the system of the laundry machine.