Hibernian’s Nick Montgomery won his first Premiership game in seven after scoring the lone goal against Kilmarnock.
After Martin Boyle had done a brilliant job of setting up his teammate, the midfielder scored from close quarters.
Easter Road is now only one point behind Kilmarnock, which holds the sixth position in the Premiership.
Kilmarnock had some good moments, but the wait to win at Leith stretched on for 10 matches.
Jair Tavares had a promising start with his solo shot from the outside of the box after only four minutes.
Portuguese winger managed to escape Joe Wright’s grasp with some neat skills, but the curling shot he fired just missed the top right corner.
Boyle, a Hibs striker, had the ball into the goal a few moments later. However the attempt was disallowed for being offside.
Kilmarnock did their best in the opening exchanges, but Liam Donnelly could have been better for his half-volley that he missed at the far post after a corner from Daniel Armstrong.
Boyle, the Australia International lost his feet in the box when Stuart Findlay chased him down.
In the 36th, Boyle made a fantastic assist to Campbell.
The forward, who was able to move quickly in a crowded centre circle, was slowed down by Donnelly’s cynical tackle. Donnelly received a retroactive booking for his ill-advised challenge.
Boyle flicked the ball to Campbell in the box and the midfielder smashed a low shot past Will Dennis.
Kilmarnock replaced Donnelly with Matty Kennedy at half-time as they tried to gain a foothold on the match.
The visitors failed to generate any real opportunities during a second period that was largely devoid of entertainment.
Dennis did a brilliant job to turn the corner for Hibs after Tavares’ attempt from the outside of the box.
As the game neared its end, Hibs fans became more tense as they realized that their team had lost two consecutive league matches.
Dennis stopped Campbell’s stinging shot from the outside of the box in the 86th-minute.
Hibs’ goalkeeper David Marshall made an impressive save near his post in order to stop Rory McKenzie.