Cooperative has long been regarded as a vital tool to promote technology adoption and boost smallholder farmers’ income. Cooperatives are being tapped to extend hands-on training and seminars on production and management practices in dairy buffalo milk production. Several studies investigated the causal relationship between technology adoption and cooperative membership. However, no empirical studies tried to explore the effect of cooperative membership on the technology adoption extensity. This study analyzes the factors affecting the decision of farmers to become members of cooperatives and the impact of cooperative membership on the adoption of technologies. The study utilized farm-level data from 351 randomly selected dairy buffalo raisers from the Philippines’ major dairy buffalo milk-producing regions. The Poisson regression with endogenous treatment model was used to analyze causality that links cooperative membership to technology adoption. Variables representing cooperative membership, farmgate price of milk, dairy farming as the primary source of income, training attendance, number of milking cows, and cold storage (refrigerator/freezer) ownership positively influence the technology adoption. The results of the endogenous treatment regression show that cooperative membership positively and significantly influenced technology adoption. Findings imply that cooperative membership is an effective tool to enhance technology uptake among dairy buffalo farmers for improved productivity and income.