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abstract: 'We present measurements of the neutron-capture elements Rb and Pb in five giant stars of the globular cluster NGC 6752 and Pb measurements in four giants of the globular cluster M 13. The abundances were derived by comparing synthetic spectra with high resolution, high signal-to-noise ratio spectra obtained using HDS on the Subaru telescope and MIKE on the Magellan telescope. The program stars span the range of the O-Al abundance variation. In NGC 6752, the mean abundances are \[Rb/Fe\] = $-$0.17 $\pm$ 0.06 ($\sigma$ = 0.14), \[Rb/Zr\] = $-$0.12 $\pm$ 0.06 ($\sigma$ = 0.13), and \[Pb/Fe\] = $-$0.17 $\pm$ 0.04 ($\sigma$ = 0.08). In M 13 the mean abundance is \[Pb/Fe\] = $-$0.28 $\pm$ 0.03 ($\sigma$ = 0.06). Within the measurement uncertainties, we find no evidence for a star-to-star variation for either Rb or Pb within these clusters. None of the abundance ratios \[Rb/Fe\], \[Rb/Zr\], or \[Pb/Fe\] are correlated with the Al abundance. NGC 6752 may have slightly lower abundances of \[Rb/Fe\] and \[Rb/Zr\] compared to the small sample of field stars at the same metallicity. For M 13 and NGC 6752 the Pb abundances are in accord with predictions from a Galactic chemical evolution model. If metal-poor 