Comprehensive SummaryAllenes, served as highly sought‐after building blocks, are an indispensable component of synthetic chemistry. Their utility in modulating the chemical, physical, and pharmaceutical properties of organic compounds make allenes a desirable choice in various applications. Here, we report a facile method for the atom‐economical synthesis of propargyl allenylamines via an underdeveloped [2,3]‐sigmatropic rearrangement. Our strategy employs easily accessible propargylamines as starting materials, which are first converted into propargyl ammonium salts, followed by a base‐promoted [2,3]‐sigmatropic rearrangement. This one‐pot, two‐step reaction proceeds in the absence of transition metals, displays a very broad scope, and does not require the introduction of the electron‐withdrawing group into the starting materials.