Provided is a bending tube 20 including: a plurality of slits 30 formed on an outer circumference of the bending tube 20 and hole portions 31 to which wire guides 40 are respectively fixed, the hole portions 31 being formed on the outer circumference of the bending tube 20. A slit interval in a central region 20b backward from a distal end region 20a is longer than a slit interval in the distal end region 20a. Each hole portion 21 that is formed at least between the slits on an outer circumference of the distal end region 20a is communicated with any one of the slits that sandwich the hole portion in an insertion direction S.
