The France international has six goals from 14 appearances across all competitions so far, having managed 17 across the entirety of last season.
Arsenal have found Lacazette's best position a problem, though, with the forward sometimes deployed down the middle or on the flanks.
And Deschamps believes he is better-suited to playing as a striker, rather than a winger.
He said: “Lacazette is an axial [central] striker.
“It's true that he has already been able to evolve elsewhere for his club.
“But it is in the axis [leading the line] that he is at his most powerful."