To provide a pipe end part joining body which joins a first tubular member and a second tubular member while assuring sealing property.

This pipe end part joining body is provided with band springs 4b, which respectively cover an outer flank of an end part of a ceramic tube 1 having a zeolite film and an outer flank of an end part of a metallic tube 5 in a state where the end part of the ceramic tube 1 having the zeolite film and the end part of the metallic tube 5 are joined to each other, and fluorinated elastomers 3b which have elasticity and are arranged respectively between the band spring 4b and the outer flank of the ceramic tube 1 having the zeolite film and between the band spring 4b and the outer flank of the metallic tube 5.