The tubegusset plate connections are widely used in electric transmission towers. However, there is little technical information regarding the behavior of tubegusset plate connections. Thus, a analytical parametric study was conducted to investigate the behavior of tubegusset plate connections. The analytical results were compared with the existing experimental results. It was found that the finite element analysis results were in good agreement with the experimental results. In the parametric study, the effects of geometry, chord load and stiffener on the ultimate strength were considered. Based on the analytical results, a design method for predicting the ultimate strength of tubegusset connections was proposed, and its applicability was verified.