Using variational methods, we establish existence of multi-bump solutions for the following class of problems
$$begin{aligned} left{ begin{array}{l} Delta ^2 u +(lambda V(x)+1)u = f(u), quad text{ in } quad mathbb {R}^{N}, u in H^{2}(mathbb {R}^{N}), end{array} right. end{aligned}$$
where
(N ge 1),
(Delta ^2) is the biharmonic operator,
f is a continuous function with subcritical growth,
(V : mathbb {R}^N rightarrow mathbb {R}) is a continuous function verifying some conditions and
(lambda >0) is a real constant large enough.
