In this paper, we introduce three new classes
S
k
a
M
,
N
;
μ
,
R
k
a
μ
, and
T
k
a
θ
of analytic functions defined by Fournier–Ruscheweyh integral operator. For these classes, we investigate the majorization problem. Furthermore, a number of new results are shown to follow upon specializing the parameters involved in our main results.