The authors propose that the Higgs boson of the Standard Model (SM) can serve as the inflaton, leading to inflation and producing cosmological perturbations consistent with observations. The key requirement is the non-minimal coupling of the Higgs scalar field to gravity, without introducing any new particles beyond those already present in the electroweak theory. The model is analyzed using the slow-roll approximation, and it is shown that the spectral index and tensor-to-scalar ratio predicted by this model fall within the 1σ confidence contours of WMAP-3 observations. The authors also discuss the impact of radiative corrections, concluding that they do not spoil the flatness of the potential required for inflation. The hypothesis suggests a non-trivial connection between electroweak symmetry breaking and the structure of the universe, and it can be applied to various extensions of the SM, such as the MSM (SM plus three light fermionic singlets), which can explain neutrino masses, dark matter, baryon asymmetry, and inflation without introducing additional particles.The authors propose that the Higgs boson of the Standard Model (SM) can serve as the inflaton, leading to inflation and producing cosmological perturbations consistent with observations. The key requirement is the non-minimal coupling of the Higgs scalar field to gravity, without introducing any new particles beyond those already present in the electroweak theory. The model is analyzed using the slow-roll approximation, and it is shown that the spectral index and tensor-to-scalar ratio predicted by this model fall within the 1σ confidence contours of WMAP-3 observations. The authors also discuss the impact of radiative corrections, concluding that they do not spoil the flatness of the potential required for inflation. The hypothesis suggests a non-trivial connection between electroweak symmetry breaking and the structure of the universe, and it can be applied to various extensions of the SM, such as the MSM (SM plus three light fermionic singlets), which can explain neutrino masses, dark matter, baryon asymmetry, and inflation without introducing additional particles.