 <p>Look at some of the options here:</p> <p><a href="http://highcharts.uservoice.com/forums/55896-general/suggestions/804783-gantt-chart" rel="nofollow">http://highcharts.uservoice.com/forums/55896-general/suggestions/804783-gantt-chart</a></p> <p>Best option is not to use actual bars, but to use line series with lineWidth set to a high enough value to mimic bars visually.</p>