Computational Intelligence and Neuroscience has retracted the article titled “Analysis of Pull-In Instability of Geometrically Nonlinear Microbeam Using Radial Basis Artificial Neural Network Based on Couple Stress Theory” [1]. The article was found to contain a substantial amount of material from the following published article: Mohammad Heidari, Yaghoub Tadi Beni, and Hadi Homaei, “Estimation of Static Pull-In Instability Voltage of Geometrically Nonlinear Euler-Bernoulli Microbeam Based on Modified Couple Stress Theory by Artificial Neural Network Model,” Advances in Artificial Neural Systems, vol. 2013, Article ID 741896, 10 pages, 2013. doi:10.1155/2013/741896 [2]. In addition, Figures and in [1] are similar to Figures and in [2]. Dr. Mohammad Heidari did not agree with this retraction, while Drs. Ali Heidari and Hadi Homaei were not reachable.