Sensor unit, and seat equipped with sensor unit

A method for manufacturing a seat equipped with a sensor unit, wherein the sensor unit has a biological sensor that detects a biological signal of the seated occupant, a communication unit that is connected to the biological sensor to transmit the detected biological signal to an outside and a sensor holder that holds the biological sensor and the communication unit, the method comprising:

• preparing the seat in which a seated occupant is seated;
• and
• attaching the sensor unit to the seat,
• wherein the sensor holder includes a seat attachment portion detachably attached to an attached portion that is provided in the seat at a position at which the seated occupant is abuttable against the attached portion,
• wherein the seat attachment portion is provided in both end portions in a longitudinal direction of the sensor holder, and
• wherein the seat attachment portion is attached to the attached portion of the seat such that a front surface, an upper surface, a bottom surface, and a rear surface of the attached portion are covered with the seat attachment portion.