[Problem] There is provided an image diagnosis catheter capable of maintaining a transmission direction of light in a fixed direction with respect to a transmission direction of an ultrasound.[Means for Resolution] An image diagnosis catheter (100) includes a rotatable drive shaft (140), a sheath (110) into which the drive shaft is inserted, a housing (146) provided at a distal end of the drive shaft and accommodating an ultrasound transmitter and receiver (145a) and an optical transmitter and receiver (145b), and a positioning member (220) fixed to the housing and fixing a relative position of the optical transmitter and receiver with respect to the ultrasound transmitter and receiver.
