We present weak lensing shear catalogues from the fourth data release of the Kilo-Degree Survey, KiDS-1000, spanning 1006 square of deep and high-resolution imaging. Our ‘gold-sample’ of galaxies, with well-calibrated photometric redshift distributions, of 21 million galaxies with an effective number density of 6. 17 galaxies per square arcminute. We quantify the accuracy of the, temporal, and flux-dependent point-spread function (PSF) model, verifying that the model meets our requirements to induce than a 0. 1σ change in the inferred cosmic shear constraints on the clustering cosmological parameter S 8 = σ8 √ Ωm/0. 3. Through series of two-point null-tests, we validate the shear estimates, finding no evidence for significant non-lensing B-mode distortions the data. The PSF residuals are detected in the highest-redshift bins, originating from object selection and/or weight bias. The is, however, shown to be sufficiently low and within our stringent requirements. With a shear-ratio null-test, we verify the redshift scaling of the galaxy-galaxy lensing signal around luminous red galaxies. We conclude that the joint KiDS-1000 and photometric redshift calibration is sufficiently robust for combined-probe gravitational lensing and spectroscopic clustering.