Apart　from　the　well-recognized　popularity　and　importance　of　online　question-and-answer　(Q&A)　communities,　the　sustainable　growth　of　these　platforms　is　a　serious　concern　faced　by　online　knowledge-sharing　platforms.　Personality　traits　play　a　significant　role　in　shaping　human　behavior　and　decision-making.　Numerous　studies　have　attempted　to　understand　the　volunteer　knowledge　contribution　and　provide　solutions　to　improve　low　participation.　However,　the　role　of　personality　traits　of　online　knowledge-sharing　community　users　in　their　volunteer　knowledge　contribution　is　still　unexplored.　Based　on　the　big　five　personality　traits,　we　have　proposed　a　model　to　understand　the　role　of　personality　features　of　online　users.　We　have　collected　a　cross-sectional　dataset　from　online　Q&A　community　users　and　applied　the　SEM-ANN　model　to　conclude　our　model　results　that　will　provide　insight　into　online　community　users’　contribution　behavior.　Findings　show　that　agreeableness,　openness,　extrovert,　and　conscientiousness　positively　and　neuroticism　negatively　influence　online　participation　to　contribute　knowledge.　We　have　also　observed　that　the　influence　of　personality　traits　significantly　differs　for　both　genders,　and　negativity　bias　is　stronger　in　male　users.　Study　results　provide　new　insight　into　understanding　online　users’　behavior　and　provide　a　distinct　angle　to　understand　and　add　value　to　previous　studies’　findings　on　online　Q&A　community　users.　©　2023　Taylor　&　Francis　Group,　LLC.