A rotary changer configured to attach or remove a contact tip to/from a tip end of a torch body of a welding torch by turning the contact tip on its center axis, the rotary changer comprising: a first rotator to be driven in rotation on a first rotational axis; a first spring member configured to bias the first rotator in the one direction along the rotational axis of the first rotator; characterized in that the rotary changer further comprises: a plurality of second rotators provided to be rotatable on a second rotational axis that extends in the same direction as the first rotational axis and arranged side by side perpendicularly to the second rotational axis in order to turn the contact tip with the center axis of the contact tip aligned with the second rotational axis; a moving mechanism configured to move one of the second rotators after another to sequentially bring the second rotational axis of each of the second rotators into alignment with the first rotational axis at a position in one of two directions along the rotational axis of the first rotator; and a second spring member configured to bias the second rotator in a direction away from the first rotator along the rotational axis of the second rotator; wherein the first rotator has an engaging projection with an engaging face extending along the rotational axis of the first rotator, each said second rotator has an engageable projection with an engageable face extending along the rotational axis of the second rotator, and rotating the first rotator with the second rotator, of which the second rotational axis is aligned with the first rotational axis, moved toward the first rotator brings the engaging face into engagement with the engageable face. a first rotator to be driven in rotation on a first rotational axis; a first spring member configured to bias the first rotator in the one direction along the rotational axis of the first rotator; characterized in that the rotary changer further comprises: a plurality of second rotators provided to be rotatable on a second rotational axis that extends in the same direction as the first rotational axis and arranged side by side perpendicularly to the second rotational axis in order to turn the contact tip with the center axis of the contact tip aligned with the second rotational axis; a moving mechanism configured to move one of the second rotators after another to sequentially bring the second rotational axis of each of the second rotators into alignment with the first rotational axis at a position in one of two directions along the rotational axis of the first rotator; and a second spring member configured to bias the second rotator in a direction away from the first rotator along the rotational axis of the second rotator; wherein a plurality of second rotators provided to be rotatable on a second rotational axis that extends in the same direction as the first rotational axis and arranged side by side perpendicularly to the second rotational axis in order to turn the contact tip with the center axis of the contact tip aligned with the second rotational axis; a moving mechanism configured to move one of the second rotators after another to sequentially bring the second rotational axis of each of the second rotators into alignment with the first rotational axis at a position in one of two directions along the rotational axis of the first rotator; and a second spring member configured to bias the second rotator in a direction away from the first rotator along the rotational axis of the second rotator; wherein the first rotator has an engaging projection with an engaging face extending along the rotational axis of the first rotator, each said second rotator has an engageable projection with an engageable face extending along the rotational axis of the second rotator, and rotating the first rotator with the second rotator, of which the second rotational axis is aligned with the first rotational axis, moved toward the first rotator brings the engaging face into engagement with the engageable face.