  The transverse momentum ($p_{\mathrm T}$) distribution of primary charged
particles is measured in minimum bias (non-single-diffractive) p-Pb collisions
at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ALICE detector at the LHC. The
$p_{\mathrm T}$ spectra measured near central rapidity in the range
$0.5<p_{\mathrm T}<20$ GeV/$c$ exhibit a weak pseudorapidity dependence. The
nuclear modification factor $R_{\mathrm{pPb}}$ is consistent with unity for
$p_{\mathrm T}$ above 2 GeV/$c$. This measurement indicates that the strong
suppression of hadron production at high $p_{\mathrm T}$ observed in Pb-Pb
collisions at the LHC is not due to an initial-state effect. The measurement is
compared to theoretical calculations.
