The hosts were awarded a penalty on 26 minutes when former Spireite Harvey Araujo was judged to have blocked Ryan Stirk’s cross with his arm and referee Simon Mather pointed to the spot. Will Grigg stepped up to send goalkeeper Matt Macey the wrong way.
And it was 2-0 six minutes before half-time when Dilan Markanday blasted in from the edge of the box after some good work by James Berry.
Substitute Lee Bonis added a third moments after coming on to seal a comfortable and deserved victory to move the Blues back into the top seven.
Here are our player ratings from the game...
9. Dilan Markanday 7
Dilan Markanday 7 Had a couple of tricky runs down the right, creating a chance for Grigg, before he blasted Chesterfield into a 2-0 lead with an emphatic finish from the edge of the box. Replaced by Mandeville with 10 to go. Photo: Submitted
10. James Berry 7
James Berry 7 Came closing to making it 2-0 before the break with a curling strike which wasn't far away. His confidence levels were up after that and moments later it was his great run and pass which helped create the second. Off for Duffy on 70. Photo: Brian Eyre
11. Will Grigg 7
Will Grigg 7 Had Chesterfield's first effort on target with a header from Markanday's cross, which was tipped over by Macey. Made no mistake from the spot midway through the first-half to put Town 1-0 up. Replaced by Bonis on 70. Photo: Tina Jenner
12. Lee Bonis 7
Lee Bonis 7 On for Grigg with 20 to go and made it 3-0 with a first-time finish in the box. Had the ball in the net again during 12 minutes of added-time but the offside flag was up. Photo: Submitted