Through　the　push-out　tests,　the　static　behavior　of　the　headed　stud　connector　with　the　diameter　of　22　mm　was　investigated.　Totally　8　specimens　were　designed　to　study　the　effect　of　a　number　of　parameters　on　the　static　behavior　of　stud　connector.　These　were　the　compressive　strength　of　concrete,　the　number　and　the　position　of　stud　connector.　The　results　indicated　that　the　cracking　and　crash　failure　occurred　in　the　stud　connector　with　more　than　4　studs,　and　studs　occurred　shear　failure　in　the　stud　connector　with　less　than　4　studs.　The　load-carrying　capacity　values　from　the　testing　are　larger　than　that　from　design　codes.　Based　on　the　testing　results,　the　formula　of　load-slip　relationship　for　stud　connector　was　proposed.　It　can　predict　the　linear　and　nonlinear　behavior　of　the　stud　connector.　It　helps　to　the　design　and　numerical　calculation　for　stud　connector　and　composite　beam.