  We propose a fault-tolerant implementation of the quantum Householder
reflection, which is a key operation in various quantum algorithms,
quantum-state engineering, generation of arbitrary unitaries, and entanglement
characterization. We construct this operation using the modular approach of
composite pulses and a relation between the Householder reflection and the
quantum phase gate. The proposed implementation is highly insensitive to
variations in the experimental parameters, which makes it suitable for
high-fidelity quantum information processing.
