2018 Challenger Ciudad de Guayaquil – Doubles

Marcelo Arévalo and Miguel Ángel Reyes-Varela were the defending champions but chose not to defend their title.

Guillermo Durán and Roberto Quiroz won the title after defeating Thiago Monteiro and Fabrício Neis 6–3, 6–2 in the final.

Seeds
• # Ariel Behar / 🇦🇷 Andrés Molteni (quarterfinals)

• # Martín Cuevas /  Pablo Cuevas (semifinals)

• # 🇪🇨 Gonzalo Escobar / 🇧🇷 Fernando Romboli (first round)

• # 🇦🇷 Guillermo Durán / 🇪🇨 Roberto Quiroz (champions)