A spinning unit comprising: a drafting section adapted to draft a fiber bundle, a spinning section adapted to twist the fiber bundle drafted by the drafting section, a pneumatic actuator adapted to move the spinning section in a direction away from the drafting section, and an elastic member adapted to move the spinning section in a direction towards the drafting section, wherein the spinning section includes: a fiber guide adapted to guide the fiber bundle into a spinning chamber, a nozzle block adapted to guide air to the spinning chamber, a spindle adapted to guide the fiber bundle twisted in the spinning chamber to outside, a nozzle holder adapted to support the fiber guide and the nozzle block, and a spindle holder adapted to support the spindle, wherein the pneumatic actuator is adapted to move the spindle holder in the direction away from the drafting section, and the elastic member is adapted to move the spindle holder in the direction towards the drafting section, with a holding section adapted to hold the spinning section at a position located away from the drafting section, characterized in that the spinning section is provided with a pin (Pi), and the holding section includes a hook to be hooked on the pin (Pi) and an urging member adapted to urge the hook in a direction in which the hook is released from the pin (Pi), wherein under a state in which the hook is hooked on the pin (Pi), when the spinning section is moved in the direction away from the drafting section, the hook is released from the pin (Pi) by the urging member. a drafting section adapted to draft a fiber bundle, a spinning section adapted to twist the fiber bundle drafted by the drafting section, a pneumatic actuator adapted to move the spinning section in a direction away from the drafting section, and an elastic member adapted to move the spinning section in a direction towards the drafting section, wherein the spinning section includes: a fiber guide adapted to guide the fiber bundle into a spinning chamber, a nozzle block adapted to guide air to the spinning chamber, a spindle adapted to guide the fiber bundle twisted in the spinning chamber to outside, a nozzle holder adapted to support the fiber guide and the nozzle block, and a spindle holder adapted to support the spindle, wherein the pneumatic actuator is adapted to move the spindle holder in the direction away from the drafting section, and the elastic member is adapted to move the spindle holder in the direction towards the drafting section, with a holding section adapted to hold the spinning section at a position located away from the drafting section, characterized in that the spinning section is provided with a pin (Pi), and the holding section includes a hook to be hooked on the pin (Pi) and an urging member adapted to urge the hook in a direction in which the hook is released from the pin (Pi), wherein under a state in which the hook is hooked on the pin (Pi), when the spinning section is moved in the direction away from the drafting section, the hook is released from the pin (Pi) by the urging member. a fiber guide adapted to guide the fiber bundle into a spinning chamber, a nozzle block adapted to guide air to the spinning chamber, a spindle adapted to guide the fiber bundle twisted in the spinning chamber to outside, a nozzle holder adapted to support the fiber guide and the nozzle block, and a spindle holder adapted to support the spindle, wherein the pneumatic actuator is adapted to move the spindle holder in the direction away from the drafting section, and the elastic member is adapted to move the spindle holder in the direction towards the drafting section, with a holding section adapted to hold the spinning section at a position located away from the drafting section, characterized in that the spinning section is provided with a pin (Pi), and the holding section includes a hook to be hooked on the pin (Pi) and an urging member adapted to urge the hook in a direction in which the hook is released from the pin (Pi), wherein under a state in which the hook is hooked on the pin (Pi), when the spinning section is moved in the direction away from the drafting section, the hook is released from the pin (Pi) by the urging member.