Background: Percutaneous access to the jejunum is an important approach if gastrostomy feeding is not possible. Objective: To analyze success, short- and long-term complications (STCs, LTCs) in patients with percutaneous endoscopic jejunostomy (PEJ) and jejunal access through percutaneous endoscopic gastrostomy (Jet-PEG). Methods: A retrospective analysis of endoscopically placed PEJs and Jet-PEGs. Success rates, mortality, STCs and LTCs were investigated for risk factors comprising demographic data, underlying disease, previous surgery and experience of the endoscopist. Results: 205 PEJ and 58 Jet-PEG placements were included in the study. PEJs and Jet-PEGs were successfully placed in 65.4 and 89.7%, respectively. Billroth II surgery predisposed in favor of a significantly higher success rate for PEJ placement (p = 0.014, OR = 2.27). Inexperienced examiners have a significantly (p = 0.040) lower success rate for tube insertion than examiners with a medium level of experience. STCs and LTCs occurred evenly in PEJ and Jet-PEG patients. Dislocation of the tube occurred significantly more frequently in Jet-PEG patients (33.3%, p = 0.005). Aspiration was most common for bedridden patients. Conclusion: PEJ has a significantly lower success rate for insertions, but fewer LTCs. The experience of the endoscopist correlates with the success rate of tube insertion.