Judge Juan Carlos Peinado will hear Sánchez as a "witness" at his official residence at 11:00 am (0900 GMT) on July 30, a court statement said.
He will be questioned over suspected influence peddling by his wife, the court said.
The investigation over alleged corruption and influence peddling has infuriated Sánchez, who has characterised the allegations as an effort to undermine him and his left-wing government.
Gómez on Friday invoked her right to remain silent under questioning by a judge.
Gómez had briefly appeared before the same judge on July 5th, but the hearing was suspended after her lawyer said they had "not been notified" about all the complaints against her and asked for time to study them.
READ MORE: Spain PM's wife stays silent before judge in corruption probe
The investigation began on April 16th following a complaint by Manos Limpias ("Clean Hands"), an anti-graft NGO linked to the far-right, alleging corruption in the private sector and influence peddling, while admitting its claims were based on media reports.
A second complaint, citing influence peddling, was filed by Hazte Oir ("Make Yourself Heard"), an ultra-Catholic pressure group with far-right ties.
Sánchez has repeatedly insisted his wife has done nothing wrong, with his justice minister, Félix Bolaños, on Friday coming out in her defence.
READ ALSO: Who is Begoña Gómez? Spanish PM's partner thrust into spotlight
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