Daily Manly is an Instagram account that has a lot of suggestions to be a good gentleman through their simple English tagline underneath their posters. This research is aimed to figure out the implied meaning of English tagline used by Daily Manly posters on Instagram and the contribution of English tagline used in Daily Manly posters to teaching caption text. The objective of this research is to reveal the implicature conveyed by the tagline used by Daily Manly posters on Instagram, and explain its contribution to teaching caption text for the twelfth grade of senior high school. This study used qualitative content analysis. The collected data were tagline in the form of phrases, clauses and sentences underneath the posters. The data were analyzed by reducing the data, displaying the data based on their type of implicature, conveying the findings of the analysis and drawing conclusion. The result of this study showed that there are 20 posters with 20 taglines were successfully found. Based on the type of implicature, there are 8 taglines that are included as generalized conversational implicature (40%), 11 taglines that are included as particularized conversational implicature (55%), and only 1 tagline included as scalar implicature (5%). Based on this result, the researcher concluded that Daily Manly often give advice or command implicitly as the reader need to draw some knowledge to infer the meaning. The implication of this research is the data source of this research can contribute to teaching caption text for the twelfth grade of senior high school. Students can observe the posters to find out the meaning implied by the tagline or caption and create caption related to the posters.