\begin{abstract} This paper reviews the most common activation functions for convolution neural networks. They are evaluated on the Asirra, GTSRB, HASYv2, STL-10, CIFAR-10, CIFAR-100 and MNIST dataset. Possible reasons for the differences in their performance are given. New state of the art results are achieved for Asirra, GTSRB, HASYv2 and STL-10. \end{abstract}