Magnetic properties of the itinerant ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>LaCrGe</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> under pressure studied by <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>La</mml:mi><mml:mprescripts /><mml:none /><mml:mn>139</mml:mn></mml:mmultiscripts></mml:math> NMR

$^{139}$La nuclear magnetic resonance (NMR) measurements under pressure ($p = 0-2.64$ GPa) have been carried out to investigate the static and dynamic properties of itinerant ferromagnet LaCrGe$_3$. $^{139}$La-NMR spectra for all measured pressures in ferromagnetically ordered state show a large shift due internal field induction $|$$B_{\rm int}$$|$ $\sim$ 4 T at La site produced by Cr moments. The change $B_{\rm int}$ less than 5\% with $p$ up 2.64~GPa indicates that 3$d$ moments are robust pressure. temperature dependence NMR suggest ferromagnetic order develops below 50~K higher 7.2 T. Based on analysis data using self-consistent-renormalization (SCR) theory, spin fluctuations paramagnetic well above $T_{\rm C}$ revealed be three dimensional throughout region.