You can try this const list = [ { "a" : "2" , "ss" : [ { "name" : "pourush" , "age" : "25" }, { "name" : "Mak" , "age" : "25" } ] }, { "b" : "3" , "ss" : [ { "name" : "James" , "age" : "19" }, { "name" : "shaun" , "age" : "20" } ] } ] console.log( list .map( function (m) { return m.ss;} ).flat())