Plasma generating apparatus and treatment method using the same

A plasma generating apparatus comprising:

• a housing configured to provide an inner space in which plasma is generated;
• a ground electrode coupled to one side of the housing;
• a power electrode coupled to the other side of the housing;
• an adjusting device configured to adjust a distance between the ground electrode and the power electrode;
• and
• a controller configured to control the adjusting device,
• wherein the controller controls the adjusting device to be positioned between a first position at which a first distance between the power electrode and a target to be processed is less than a second distance between the power electrode and the ground electrode and a second position at which the first distance is greater than the second distance.