Background: Age gap plays a huge role in the relationship between siblings since the cognitive development of ten years old is indeed different from a one-year-old.  Method: This paper made use of the qualitative research approach, individually the phenomenological research design to explore and further understand the experiences of the respondents which are older siblings in an extensive age gap sibling relationship, relative to the central question “In what way do siblings with large age gaps become advantageous and disadvantageous?” Twenty-five semi-structured interview questions were used to gather all the data used in this paper and were later analyzed using an inductive approach in the development of themes. Findings: Findings have shown the experiences of older siblings in this kind of family set up in terms of Sibling Relationship, Sibling Roles, Sibling Pressure, and Sibling Adjustments. Conclusion: An addition of new members to a family affects the lives of older siblings, especially if the new addition came after half a decade or more. Recommendation: To fill in the literature gap, the researchers highly suggest considering a more significant number of respondents as well as birth orders and the gender of older siblings to get a broader perspective on the research topic.