An electro-spray ionization (ESI) sprayer tube 10 is characterized by comprising: a first tube 11 having an opening side; a second tube 12 that has an inner diameter which is larger than the outer diameter of the first tube 11, and that is disposed on the outside of the first tube 11; and tube fixing parts 14 formed so as to block the opening end side of gaps formed between the first tube 11 and the second tube 12.
展开▼
